What are the largest volcanoes found in planet Mars?

Olympus Mons is the largest volcano in the solar system. The massive Martian mountain towers high above the surrounding plains of the red planet, and may be biding its time until the next eruption. Characteristics. read more

The volcano's outer edge consists of an escarpment, or cliff, up to 8 km (5.0 mi) tall (although obscured by lava flows in places), a feature unique among the shield volcanoes of Mars. Olympus Mons covers an area approximately the size of Italy, or about 300,000 km 2 (120,000 sq mi). read more

As the largest volcano in the Solar System, Olympus Mons has been extensively studied. Those studies have been helped by the closeness of Mars. Those studies will continue into the future as will the exploration of the entire planet. read more

At a height of 25km, Olympus Mons on Mars is the largest volcano in the Solar System and is nearly three times as tall as Mount Everest. It is thought that one of the reasons that Olympus Mons and the other volcanoes on Mars are large is that the Red Planet's crust doesn't move like the Earth's. read more