Stanley Greenberg. City Tunnel No. 3, Brooklyn, New York. 1998.
Source: gittermangallery.com
Stanley Greenberg. City Tunnel No. 3, Brooklyn, New York. 1998.
Joseph Beuys, Tunnel (Cathode Rays), Felt-Room Action, 1964.
West bound tube Detroit River tunnel's subaqueous section, through which Michigan Central trains run, Detroit, Mich. c. 1912.
The underground world, by Thomas Wallace Knox, Hartford, 1877.