This photo taken Feb. 2, 2014, shows the wonders of the Ice Caves of the Apostle Islands National Lakeshore in in northern Wisconsin.(Photo/IC)
Photo taken by British photographer Tim Nevvel shows the ice cave near the Jokulsarlon Lagoon in Iceland.(Photo/IC)
Tour guide Shayne McGuire has released stunning images from her expeditions, showing the inside of Alaska's melting Mendenhall Glacier glowing a beautiful blue.(Photo/IC)
Each year, near the spring and autumn equinoxes, morning sunlight passes through the arch of Japan's Kameiwa Cave to create the image of a shining heart.(Photo/IC)
Photographer Mathis Dumas captures Jeff Mercier climbing inside the glacier, in an ephemeral cave of the Mer de Glace in France.(Photo/IC)
British adventure photographer Robbie Shone descended into the Gorner Glacier near Zermatt in Switzerland to capture spectacular pictures of ice caves.(Photo/IC)
