Alien enthusiasts believe they have found proof of ancient walled cities on Mars. The alleged evidence was a video created by the United Family of Anomaly Hunters, which was uploaded on YouTube.

The video, named NASA Spots Walled Cities on Mars from MRO Satellite, presents photographs of the Elysium Planitia taken by the Mars Reconnaissance Orbiter (MRO) of the National Aeronautics and Space Administration (NASA).  Elysium Planitia is a broad plain located near the equator of Mars and lies south of the volcanic province of Elysium, the second largest volcanic region on the Red Planet.

These photographs apparently show aerial views of domes. While some believe these to indicate signs of life on the planet, others point out that the photos only show natural geological formations.

An alien believer stated that there are structures in South Africa that look similar to the ones captured on the photo. Another speculated that these domes are the remnants of an ancient underground civilization.

Previously, alien conspiracy theorists claimed that an alien mothership crash-landed on the surface of Mars. The alleged spaceship is a 190-meter-wide object captured by the Mars Global Surveyor in 2000.

The spacecraft was found in the  Medusa Fossae formation. After landing on the planet’s surface, the alien mothership eventually got buried.

Alien hunters believe that Medusa Fossae is a dangerous area. It is a huge geological feature that extends up to 1,000 kilometers along the planet’s equator.

They also believe that other spacecrafts must have crash-landed on it. They cite that the photographs taken by the High Resolution Stereo Camera (HRSC) aboard the European Space Agency’s Mars Express spacecraft in 2005 proves that another alien ship crashed in it.

Nigel Watson, author of the UFO Investigation Manual, has added his own opinion about the cockpit-like structure on top of the alien ship. He says:  “I think it is more likely to be a natural geological formation. Though there is added mystery to the allegation that the images have been removed from websites to keep this image secret.”