7. Area 51, NEVADA
Satellite image of Area 51, Southern Nevada, United States, a remote detachment of Edwards Air Force Base. (Photo: DigitalGlobe via Getty Images)
No list of prohibited places would be complete without a mention of Area 51 — the nickname for a remote detachment of United States Air Force facility Edwards Air Force Base, located in Southern Nevada. The facility is shrouded in secrecy and while it has long believed to be a testing facility for experimental aircraft and weaponry, conspiracy theorists favorite theory that the base is where the U.S. government examines and stores a crashed alien spacecraft and the alien occupants, including evidence from a supposed alien crash landing in Roswell, New Mexico in 1947. While the area surrounding Area 51 is a popular tourist destination for alien enthusiasts, access to Area 51 itself is completely prohibited, except to intelligence and military personnel with special clearance. The airspace above the base is also a no-go area and is rumoured to be protected with anti-aircraft weaponry and fighter jets.