2. Mutnovsky Volcano Ice Caves – Russia
This ice cave on Russia’s Kamchatka Peninsula was formed when an underwater hot spring flowed through the icy glacial fields at the foot of the Mutnovsky volcano. During the right time of the year – when the temperature is warmer and the snowfall is light – you can enter the cave to peer at its snowcapped walls and witness the sun create a dazzling, colorful effect off the nearly-transparent roof.
