A Google Earth user has added to the popular Area 51 conspiracy theory by discovering what they claim are “hidden entrances” on the side of a mountain.

Area 51 is a United States Air Force facility and one of the most secret military bases in the world – making it a hotbed for wacky theories that government scientists have been dissecting aliens and hoarding ET spacecraft inside there for years.

In the clip, posted on the YouTube channel FindingUFO, a pair of oddly-sharped car parks are seen at the foot of the hill, with one appearing to be an entrance to a tunnel.

Higher up the hill, a road is visible but it comes to a dead end and appears to have vehicles parked in the top of it.

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