St. Lawrence Works, Montezuma. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Montezuma and Teller Mt. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Summit of Grey's Peak. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Kelso cabin. Gray's Peak. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Decatur Mountain from Peru Fork. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
![Burros [burro] packed for Montezuma. - Sterescope Card, Colorado](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE5MDAvMTIvMzEvYnVycm9zLWJ1cnJvLXBhY2tlZC1mb3ItbW9udGV6dW1hLTFhMTEwMi02NDAuanBn/40/22/webp "Burros [burro] packed for Montezuma. - Sterescope Card, Colorado")
Burros [burro] packed for Montezuma. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
![[A man and burros at the top of Grey's Peak.]](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE5MDAvMTIvMzEvYS1tYW4tYW5kLWJ1cnJvcy1hdC10aGUtdG9wLW9mLWdyZXlzLXBlYWstOWFmMzIwLTY0MC5qcGc%3D/40/22/webp "[A man and burros at the top of Grey's Peak.]")
[A man and burros at the top of Grey's Peak.]
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
On Grey's Peak trail. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Top of Hoosier Lode. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Montezuma and Teller Mountain. - Sterescope Card, Colorado
Picryl description: Public domain image of railroad tracks, railway, train car, free to use, no copyright restrictions.
Argentine Pass. - Sterescope Card, Colorado. NYPL Collection.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Looking west from Bald Mountain, Colorado, U.S.A.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Summit of Grey's Peak. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
"Gold Run." Hydraulic mining. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
On Grey's Peak trail. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Keystone Peak from Gray's Peak, Continental Divide, Colorado, U.S.A.
Picryl description: Public domain view of a mountain range, mountainous landscape, free to use, no copyright restrictions.
Grey's Peak from Argentine Pass. - Sterescope Card, Colorado
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Gold Run (hydraulic mining), Col. Tr.
Picryl description: Public domain image of field, irrigation, agriculture, water, free to use, no copyright restrictions.
![[Kelso cabin. Gray's Peak.] - Sterescope Card, Colorado](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE5MDAvMTIvMzEva2Vsc28tY2FiaW4tZ3JheXMtcGVhay0wZGU0MjgtNjQwLmpwZw%3D%3D/40/22/webp "[Kelso cabin. Gray's Peak.] - Sterescope Card, Colorado")
[Kelso cabin. Gray's Peak.] - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Grey's Peak. Brown and Sherman Mountains.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Gray's Peak from the summit of Glacier Mountain.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Kelso cabin. - Sterescope Card, Colorado. NYPL Collection.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Burro packed for Montezuma. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Comstock tramway, St. John's. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
![View of Gray's [Grey's] Peak looking through the Pinery above Huntsville.](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE4NzIvMTIvMzEvdmlldy1vZi1ncmF5cy1ncmV5cy1wZWFrLWxvb2tpbmctdGhyb3VnaC10aGUtcGluZXJ5LWFib3ZlLWh1bnRzdmlsbGUtNDI1OGVjLTY0MC5qcGc%3D/40/20/webp "View of Gray's [Grey's] Peak looking through the Pinery above Huntsville.")
View of Gray's [Grey's] Peak looking through the Pinery above Huntsvil...
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Summit of Grey's Peak. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Hoosier Lode. - Sterescope Card, Colorado. NYPL Collection.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Grey's Peak from gorge above Bakerville.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
![View of Gray's [Grey's] Peak looking through the Pinery above Huntsville.](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE4NzIvMTIvMzEvdmlldy1vZi1ncmF5cy1ncmV5cy1wZWFrLWxvb2tpbmctdGhyb3VnaC10aGUtcGluZXJ5LWFib3ZlLWh1bnRzdmlsbGUtMmU0NzQ0LTY0MC5qcGc%3D/40/20/webp "View of Gray's [Grey's] Peak looking through the Pinery above Huntsville.")
View of Gray's [Grey's] Peak looking through the Pinery above Huntsvil...
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
St. Lawrence Works, Montezuma. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
St. Lawrence Works, Montezuma. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Gold Run." Hydraulic mining. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Kelso cabin. - Sterescope Card, Colorado. NYPL Collection.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Gray's Peak from the summit of Glacier Mountain.
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
![[Kelso cabin. Gray's Peak.] - Sterescope Card, Colorado](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE5MDAvMTIvMzEva2Vsc28tY2FiaW4tZ3JheXMtcGVhay1kMGZiMGQtNjQwLmpwZw%3D%3D/40/22/webp "[Kelso cabin. Gray's Peak.] - Sterescope Card, Colorado")
[Kelso cabin. Gray's Peak.] - Sterescope Card, Colorado
Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.
Argentine Pass. - Sterescope Card, Colorado. NYPL Collection.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Keystone Peak from Gray's Peak, Continental Divide, Colorado, U.S.A.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Comstock tramway, St. John's. - Sterescope Card, Colorado
Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.
Keystone Peak from Gray's Peak, Continental Divide, Colorado, U.S.A.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Top of Hoosier Lode. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Grey's Peak from gorge above Bakerville.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Montezuma and Teller Mountain. - Sterescope Card, Colorado
Picryl description: Public domain image of railroad tracks, railway, train car, free to use, no copyright restrictions.
Kelso cabin. - Sterescope Card, Colorado. NYPL Collection.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Montezuma and Teller Mountain. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Kelso cabin. - Sterescope Card, Colorado. NYPL Collection.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Gray's Peak from the summit of Glacier Mountain.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Grey's Peak. Brown and Sherman Mountains.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
![View of Gray's [Grey's] Peak looking through the Pinery above Huntsville.](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE4NzIvMDEvMDEvdmlldy1vZi1ncmF5cy1ncmV5cy1wZWFrLWxvb2tpbmctdGhyb3VnaC10aGUtcGluZXJ5LWFib3ZlLWh1bnRzdmlsbGUtMTA1MTNkLTY0MC5qcGc%3D/40/20/webp "View of Gray's [Grey's] Peak looking through the Pinery above Huntsville.")
View of Gray's [Grey's] Peak looking through the Pinery above Huntsvil...
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Grey's Peak from Argentine Pass. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Grey's Peak. Brown and Sherman Mountains.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Decatur Mountain from Peru Fork. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Grey's Peak. Brown and Sherman Mountains.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
St. Lawrence Works, Montezuma. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Comstock tramway, St. John's. - Sterescope Card, Colorado
Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.
Montezuma and Teller Mt. - Sterescope Card, Colorado
Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.
Summit of Grey's Peak. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Summit of Grey's Peak. - Sterescope Card, Colorado
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Summit of Grey's Peak. - Sterescope Card, Colorado
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Kelso cabin. - Sterescope Card, Colorado. NYPL Collection.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Hoosier Lode. - Sterescope Card, Colorado. NYPL Collection.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Montezuma and Teller Mt. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Summit of Grey's Peak. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
A man and burros at the top of Grey's Peak.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Top of Hoosier Lode. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Gold Run (hydraulic mining), Col. Tr.
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Montezuma and Teller Mt. - Sterescope Card, Colorado
Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.
Argentine Pass. - Sterescope Card, Colorado. NYPL Collection.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
St. Lawrence Works, Montezuma. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Burro packed for Montezuma. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Grey's Peak from Argentine Pass. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Argentine Pass. - Sterescope Card, Colorado. NYPL Collection.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
![View of Gray's [Grey's] Peak looking through the Pinery above Huntsville.](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE4NzIvMDEvMDEvdmlldy1vZi1ncmF5cy1ncmV5cy1wZWFrLWxvb2tpbmctdGhyb3VnaC10aGUtcGluZXJ5LWFib3ZlLWh1bnRzdmlsbGUtYmZlMWE1LTY0MC5qcGc%3D/40/20/webp "View of Gray's [Grey's] Peak looking through the Pinery above Huntsville.")
View of Gray's [Grey's] Peak looking through the Pinery above Huntsvil...
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Grey's Peak from Argentine Pass. - Sterescope Card, Colorado
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Grey's Peak from gorge above Bakerville.
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Summit of Grey's Peak. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
St. Lawrence Works, Montezuma. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
A man and burros at the top of Grey's Peak.
Picryl description: Public domain image of the back of stereograph card, stereoscopic view, free to use, no copyright restrictions
Kelso cabin. - Sterescope Card, Colorado. NYPL Collection.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Keystone Peak from Gray's Peak, Continental Divide, Colorado, U.S.A.
Picryl description: Public domain view of a mountain range, mountainous landscape, free to use, no copyright restrictions.
![Burros [burro] packed for Montezuma. - Sterescope Card, Colorado](https://cache.getarchive.net/Prod/thumb/cdn6/L3Bob3RvLzE4NTAvMDEvMDEvYnVycm9zLWJ1cnJvLXBhY2tlZC1mb3ItbW9udGV6dW1hLTRiYmJiYy02NDAuanBn/40/22/webp "Burros [burro] packed for Montezuma. - Sterescope Card, Colorado")
Burros [burro] packed for Montezuma. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Gold Run." Hydraulic mining. - Sterescope Card, Colorado
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
Kelso cabin. - Sterescope Card, Colorado. NYPL Collection.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
On Grey's Peak trail. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Kelso cabin. - Sterescope Card, Colorado. NYPL Collection.
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
St. Lawrence Works, Montezuma. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Comstock tramway, St. John's. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Looking west from Bald Mountain, Colorado, U.S.A.
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Kelso cabin. Gray's Peak. - Sterescope Card, Colorado
Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.
"Gold Run." Hydraulic mining. - Sterescope Card, Colorado
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
On Grey's Peak trail. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Colorado, Tenmile District special map
Public domain scan of a architecture diagram, settlement map, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Gold Run (hydraulic mining), Col. Tr.
Picryl description: Public domain image of field, irrigation, agriculture, water, free to use, no copyright restrictions.
Looking west from Bald Mountain, Colorado, U.S.A.
Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description
St. Lawrence Works, Montezuma. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Burro packed for Montezuma. - Sterescope Card, Colorado
Colorado stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Montezuma and Teller Mountain. - Sterescope Card, Colorado
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description