Hallasan
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Hallasan (Korean: 한라산) is a shield volcano on Jeju Island in South Korea. Its summit, at 1,947 m (6,388 ft), is the highest point in the country. The area around the mountain is a designated national park, named Hallasan National Park. Hallasan is commonly considered to be one of the three main mountains of South Korea, along with Jirisan and Seoraksan.
View of the mountain from above (2011)
Satellite image showing Hallasan at the center of Jeju Island (2000)
The crater lake Baengnokdam (November 2012)
Hallasan Sunrise
Volcanic crater lake
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A volcanic crater lake is a lake in a crater that was formed by explosive activity or a collapse during a volcanic eruption.
The crater lake of Mount Rinjani, Indonesia
Lake Yeak Laom, Cambodia
Landsat image of Lake Toba, Indonesia, the largest volcanic crater lake in the world
Lake Barombi, Cameroon