The rise of the Atomic Age and the advent of the Cold War between the United States and the Soviet Union brought a new arms race that gave way to all sorts of mysteries related to the extraterrestrial and paranormal.

Deep and inexplicable secrets have fascinated Americans, from the top-secret and mythical Area 51 to the Roswell Incident. Such has been the case of an ominous and strange-looking pyramid reminiscent of those erected by the ancient Egyptian pharaohs.

Except this one was built in the arid landscape of Utah. The bizarre structure, which can be appreciated through satellite imagery, is the burial tomb of one of America’s secrets. It’s hidden from prying eyes by a unique feature: no one can get close to it…

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Dark Footage showcases the most unbelievable photos and videos from history while telling the stories behind the camera. Featuring military, space, aircraft and real-life historic events caught on tape.