A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.
Location: S-4 Area in Area 51 Nevada Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: I have been told by many people (all military) that Area 51 isn't really where much is going on – or at least the whole "aliens/crashed saucers are there" mystique is a bit hyped because the area is able to be so secured.
The Tunnels: Escapes Under the Berlin Wall and the Historic Films the JFK White House Tried to Kill [Greg Mitchell] on . *FREE* shipping on qualifying offers. A thrilling Cold War narrative of superpower showdowns, media suppression, and two escape tunnels beneath the Berlin Wall In the summer of 1962
Secret Underground Bases and Facilities. The history of humanity is laced with stories about secret underground facilities and bases that go back to the beginning and - more recently highlighted with catacombs of many cities - and caves that lead to underground chambers for all sorts of purposes, mostly thought of as clandestine - run by the men in power in a particular timeline.
"The military utility for underground construction is obvious. I recall years ago studying the matter in the context of American Cold War military strategy. during the 1950's, motivated by a fear of Soviet missiles striking American installations and cities, military planners recognized the value of secure facilities deep underground."