The volcano in question is known as Olympus Mons and is three times higher than Mount Everest.

Olympus Monds is over 20km high and over 600km in diameter. NASA says that, if someone decided to climb the mountain, it would be a relatively simple task, taking into account the shallow slopes and lighter gravity on Mars.

Researchers believe that Olympus Mons last erupted 25 million years ago and was formed by slower lava flows. The photograph was captured by the European Space Agency's Mars Express probe, which is currently in orbit around the Red Planet.