Underground Bases and Tunnels
The first section of this page was written by Phil Schneider:
Photo of United States Air Force tunnel boring machine at Little Skull Mountain, Nevada, USA, December 1982. There are many rumors of secret military tunnels in the United States. If the rumors are true, machines such as the one shown here are used to make the tunnels. (Source: U.S. Department of Energy.)
This is a $13 million tunnel boring machine (TBM) used for tunneling at the Nevada Test Site. (Remember that Area 51 is part of the test site.) Many other types of TBMs are used by many government agencies, including the ‘nuclear powered TBM’ [NTBM] that melts solid rock and leaves behind glass-like walls.
Most tunneling activity is under military installations and all information is highly restricted. Former employees of said facilities have surfaced over the years to talk of massive underground installations in places like Area 51, the Northrop facility in Antelope Valley, California (rumored to have 42 levels), and the Lockheed installation near Edwards, California.