7 Places to Visit in the Solar System

Olympus Mons, Mars

Olympus Mons is the largest volcano in the solar system. It is 700 km (435 miles across and rises 22 km (14 miles) above the surrounding Tharsis plain. The edge of Olympus Mons is a cliff 10 km (6 miles) high. From there it is a shallow slope to the central craters, which are 85 km (53 miles) across. The largest such volcano on Earth, Mauna Loa in Hawaii, is 120 km (75 miles) across and 9 km (6 miles) high, although much of it is hidden beneath the ocean floor.

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