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New York Underground @ nationalgeographic.com - 1 views

www.nationalgeographic.com/...nyunderground

nyc new york city subterranean subways infrastructure cables pipes water mains underground utilities gas steam sewers tunnels hp actvf teachers teaching

shared by hpbookmarks on 02 Dec 14 - No Cached
David Hilton liked it
  • hpbookmarks on 02 Dec 14
     
    Companion website to a National Geographic special that explored subterranean NYC. Interesting, particularly in light of the current construction of the 2nd Ave. subway.
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