How big is the largest volcano? On Mars it is as big as France!
RichC | March 31, 2020
Olympus Mons is the tallest mountain and largest volcano on any planet in the solar system. It is about the size of France (or the U.S. state of Arizona) and is a shield volcano 624 km (374 mi) in diameter, 25 km (16 mi) high, and is rimmed by a 6 km (4 mi) high […]