Public domain scan of a technical diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Public domain scan of an architecture diagram, architectural drawing, building plan, or design, free to use, no copyright restrictions - Picryl description.
Public domain scan of an architecture diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Picryl description: Public domain image of a bridge, railroad structure, train viaduct, free to use, no copyright restrictions.
Picryl description: Public domain image of a bridge over a water stream, free to use, no copyright restrictions.
Public domain photograph of railway map, railroad tracks, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain photograph of a road works, construction, excavation, free to use, no copyright restrictions.