The photo above shows a surreal-looking ice cave on the Kamchatka Peninsula of Russia. It was formed by a stream flowing from the hot springs associated with the Mutnovsky volcano. Image credit: Marc Szeglat; Marc’s Web site Used with permission.
This stream flows beneath glacial ice on the flanks of Mutnovsky. Because glaciers on Kamchatka volcanoes have been melting in recent years, the roof of this cave is now so thin that sunlight penetrates through it, eerily illuminating the icy structures within. Photo taken on September 12, 2012. Summary Authors: Marc Szeglat