Supervolcanic 'hell' caldera in Japan is home to 17 different volcanoes — Earth from space
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Supervolcanic 'hell' caldera in Japan is home to 17 different volcanoes — Earth from space

A 2012 astronaut photo shows the striking beauty of Japan's Aso Caldera, a "supervolcanic" structure home to more than a dozen volcanoes and "hellish" hot springs. It was formed by several major eruptions spanning more than 200,000 years.