Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.
Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.
Picryl description: Public domain image of a quarry, mine, excavation, or mining site, free to use, no copyright restrictions.
Picryl description: Public domain image of railroad tracks, railway, train car, free to use, no copyright restrictions.
Public domain photograph of construction site, free to use, no copyright restrictions image - Picryl description