Folder: Underworld Page 2 of 4

Photographic postcard of Lassen Peak in eruption (1914-1917), with the emitting ash cloud forming the profile of "Vulcan's Face"[William Holmes Spaulding Photograph Collection, Photo by R.E. Stinson]

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A tunnel under London is built to accommodate those sheltering from air raids (c. 1941).

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Meeting of the Italian and French drilling parties during the construction of the Mont Blanc Tunnel, 14 August 1962 .

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In a salt mine at Tarthun, near Schonebeck, advancing American forces uncovered in 1945 this german underground jet plane factory. In this room, an assembly line for the Heinkel He 162's, worked 2400 persons, mostly slave laborers.

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Workers, Guards and Management Staff of the Borralha Wolfram Mines, Montalegre, Portugal, 1918.

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Hawthorn ridge mine explosion, July 1st 1916

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Félix Nadar, Catacombes de Paris, 1861

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Félix Nadar, Égouts de Paris, 1861

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Construction of the Subway Tunnel under 6th Ave., New York, 1939. Photo: Bob Seelig/New York Daily News

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The Beach Pneumatic Subway Tunnel under Broadway, 1873. New-York Historical Society # 70265 In 1869, folowing the use of pneumatic tubes for postal communication, Alfred Ely Beach started…