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Beautiful Destruction: 11 Gorgeous Geologic Maps of Volcanoes

Aso caldera Summit elevation: 5,223 ft. (1,592 m.) Mount Aso is Japan's largest volcano and its 15-mile-wide caldera is among the largest in the world. The caldera was created by four huge eruptions between 300,000 and 90,000 years ago. There are 17 volcanic cones in the caldera, among them is one of the country's most active modern volcanoes, Naka-dake. Aso has erupted 168 times in the last 1,500 yrs, most recently in May-June 2011 when ash plumes rose as high as 8,000 ft.