Arenal Volcano, pictured here behind the Monteverde Cloud Forest, is Costa Rica’s largest volcano. What’s the largest volcano in the world?

Arenal Volcano, pictured here behind the Monteverde Cloud Forest, is Costa Rica’s largest volcano. What’s the largest volcano in the world?

A The Matterhorn, Switzerland
B Mauna Loa, Hawaii
C Shiveluch, Russia

Mauna Loa on the island of Hawaii is the world’s largest active volcano. That can create some uncertainty for the nearly 1 million people living on the island. They’re not alone—800 million people around the world live within 62 miles of an active volcano.

The correct answer is Mauna Loa, Hawaii.