observation

Elaborate observation post built in the Bois de Chaume ; View taken fr...

Public domain photograph related to Germany in World War One, military conflict, free to use, no copyright restrictions image - Picryl description

Cooperstown, from Observation Hill. New York Sterecope Card.

New York 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

[Observation deck, Niagara Falls.] New York Sterecope Card.

Picryl description: Public domain image of a waterfall, cascade, water stream, free to use, no copyright restrictions.

View of the New York skyline from the observation roof atop one wing o...

Picryl description: Public domain image of Ellis Island, New York harbor, immigrants, immigration, free to use, no copyright restrictions.

Montfaucon : Destroyed entrance to tunnel used by the German crown pri...

Public domain photograph of 19th-century vintage card, free to use, no copyright restrictions image - Picryl description

Mt. Hood and City Hall from Observation Hill, Portland, Ore.

Public domain photo of vintage Oregon postcard, 19th century, free to use, no copyright restrictions image - Picryl description.

Ambulance Co. dressing station ; Concrete construction of entrance ; O...

Public domain photograph related to Germany in World War One, military conflict, free to use, no copyright restrictions image - Picryl description

Officers' quarters in Forges woods ; Church used by Germans as prison ...

Public domain photograph related to Germany in World War One, military conflict, free to use, no copyright restrictions image - Picryl description

Camouflaged road ; German observation posts ; German officers' rustic ...

Public domain photo of a monument, historic place, free to use, no copyright restrictions image - Picryl description

Burning sausage, or observation balloon ; Hand grenade exploding in sh...

Public domain photograph related to Germany in World War One, military conflict, free to use, no copyright restrictions image - Picryl description

Taking an observation of the Sun.

Public domain reproduction of artwork, free to use, no copyright restrictions image - Picryl description

A derby-topped gentleman observing the harbor form the observation roo...

Picryl description: Public domain image of Ellis Island, New York harbor, immigrants, immigration, free to use, no copyright restrictions.

Barbed wire used by Germans ; German artillery observation and control...

Public domain photograph related to Germany in World War One, military conflict, free to use, no copyright restrictions image - Picryl description

Observation Car through Royal George, Canon City, Colo.

Picryl description: Public domain photo of vintage Colorado postcard, free to use, no copyright restrictions image.

[Observation deck, Niagara Falls.] New York Sterecope Card.

Picryl description: Public domain image of a waterfall, cascade, water stream, free to use, no copyright restrictions.

Cooperstown, from Observation Hill. New York Sterecope Card.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

[Observation deck, Niagara Falls.] New York Sterecope Card.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Taking an observation of the Sun.

Public domain reproduction of artwork, free to use, no copyright restrictions image - Picryl description

Observation deck, Niagara Falls. New York Sterecope Card.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Cooperstown, from Observation Hill. New York Sterecope Card.

New York 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

Observation deck, Niagara Falls. New York Sterecope Card.

Picryl description: Public domain image of a waterfall, cascade, water stream, free to use, no copyright restrictions.

Down the glens from observation rock.

Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.

Down the glens from observation rock.

Ohio 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 assembl... More

Down the glens from observation rock.

Ohio 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 assembl... More

Down the glens from observation rock.

Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.

[Observation deck, Niagara Falls.] New York Sterecope Card.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Observation deck, Niagara Falls. New York Sterecope Card.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Observation deck, Niagara Falls. New York Sterecope Card.

Picryl description: Public domain image of a waterfall, cascade, water stream, free to use, no copyright restrictions.

Cooperstown, from Observation Hill. New York Sterecope Card.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Letter to [John Anderson, John Covenhoven, Hendrick Smock, Asher Holme...

Public domain scan of manuscript related to American history, NYPL collection, free to use, no copyright restrictions image - Picryl description.

Taking an observation of the Sun.