Maryland’s Underground [google_map_easy id=”92″] Location: Camp David Maryland Functions: Unknown Levels: Unknown Tunnels to: Frederick, MD and Fort Ritchie, PA (closed), Site R Notes: just north of the camp is an underground facility important to the intelligence agencies…. numerous people have described the entire underground facility as enormous with silent train cars that go between entrances. Updated: Camp David, the Presidential retreat, is immediately adjacent to Catoctin Mountain Park. On the surface, there are some cabins and lodges, and conference rooms for Presidential use. […] Read More