Kamchatka is situated on the Pacific 'Rim of Fire' and is best known for its volcanoes that cause the peninsula to practically percolates with geothermal activity. There are over 200 volcanoes, many of them still active, that contain huge calderas, acid lakes, geysers and natural thermal springs.

Ksudach has the largest crater lake of all the volcanoes in Kamchatka; when inside the crater it is difficult to believe you are actually inside a volcano, such is its size. The lake covers the area of a small town and is surrounded by lush vegetated hillsides.