and Tunnels Inicio by Hamilton III. from It Website . Does a strange world exist beneath our feet? Strange legends have persisted for centuries about the mysterious. Secret Underground Bases Underground Bases We recently came across a very interesting list from a book called Entrances to Subterranean Tunnels "Underground Alien Bases" UAB ISBN. Secret Underground Bases Newhope and Facilities inks 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.