Alien enthusiasts are claiming that they have found evidence proving that aliens existed on Mars.

According to Express, the conspiracy theorists have spotted three mile-high towers built in a line on the surface of the Red Planet.

READ: Aliens on Mars: NASA Captures Mysterious 'Ancient City' on the Red Planet

The bizarre structure was first noted by YouTube channel Mundodesconocido. The Youtube channel posted a video discussing the structure.

The video description read:

"Investigating on some Mars images, we have recently found a row of huge towers located in the Martian area of Terra Meridiani. Due to their peculiar features, we believe that they have an artificial origin. In the following video, we will show you all the amazing information, evidences as well as animated 3D models that will allow you to evaluate correctly the information we propose."

Headlines and Global News claims that the images on the video were gathered from the Mars Global Surveyor and Mars Odyssey missions.

Inquistr notes that the photos were taken years apart, yet the photos were matching. It also showed that the towers have similar formations with the same alignment. Given its almost perfect structure, the conspiracy theorist said it's impossible that those towers are results of natural erosive or weathering processes.

Popular UFO expert Scott Waring shared his thoughts about the tower. On his blog, UFO Sightings Daily, he wrote:

"There is a whole planet full of buildings and artefacts to be discovered on Mars. Here is a fantastic example of that posted by Youtube user Mundodesconocido. He found three towers that look to be almost a mile in height or more. They all look like they were made well because none of them is destroyed. They would be perfect for setting up a human Mars base at...if they are empty of course."

Meanwhile, neurologists have previously claimed that it's possible that UFO enthusiasts are seeing things they are not supposed to see because of a phenomenon called pareidolia, which Live Science defines asa type of apophenia, which is a more generalized term for seeing patterns in random data.