1. Abandoned Subway Tunnels

Under cities like New York and Chicago lie disused subway tunnels, abandoned after reroutes or modernization. New York’s Old City Hall station, closed in 1945, still retains its ornate tilework and lamp posts, visited by guided tours via Atlas Obscura. Chicago conceals defunct passages beneath State Street, once used for moving freight cars.
Urban explorers and photographers sometimes sneak in, drawn by graffiti-covered walls and eerie silence. These subterranean corridors offer a glimpse at the changing face of mass transit and urban evolution.