Lake Mashū is an endorheic crater lake formed in the caldera of a potentially active volcano. It is located in Akan Mashu National Park on the island of Hokkaido, Japan. It has been called the clearest lake in the world.
Lake Mashū, Japan, during winter
View from Viewing Platform No. 1 (July 2008)
Landsat image of the lake (1999)
Lake Mashū in the winter
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