Texas’s Underground Location: Alpine Texas Location: Unknown Levels: Unknown Tunnels to: Unknown Notes: The ‘haunted‘ Refugio mine in the...
Tennessee’s Underground Location: Chattanooga Tennessee Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: An unusual cave discovery that...
South Dakota’s Underground Location: ? Jim River Valley South Dakota Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: “A...
Pennsylvania’s Underground Location: 50 miles south of Pittsburgh Pennsylvania Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: About 50 miles south...
New York’s Underground Location: Adirondack Mountains (near Elizabethtown) New York Long Lake area. Piseco. Functions: This are really 2...
New Mexico’s Underground Location: Albuquerque New Mexico Functions: Unknown Levels: Multiple – 1 -? Tunnels to: Carlsbad, New Mexico...
Missouri’s Underground Location: Bonne Terre Missouri Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: Reports of ‘one of‘ the largest underground...
Minnesota’s Underground Location: Redwood Falls Minnesota Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: A WWII trainee claimed to...
Maryland’s Underground Location: Camp David Maryland Functions: Unknown Levels: Unknown Tunnels to: Frederick, MD and Fort Ritchie, PA (closed), Site R Notes: just...
Nevada’s Underground Location: American City Nevada (The Flats) Functions: (Suspected Underground UFO Base) Levels: At least seven underground...
