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 .
If that large patch of atmosphere were over russia 's kamchatka peninsula , or some other remote but volcanic region , the uncertainty would not be so bad , as it could , at a price , simply be skirted round .
Krasheninnikov volcano boasts two stunning , snowcapped summit cones . Located on the pacific shore of russia 's kamchatka peninsula , it last erupted some 400 years ago .