"Ice caves" refers to natural hollow spaces or tunnels that are formed within glaciers or ice formations. These caves are made of ice and can vary in size and shape. Full definition
This natural cave is formed from limestone and ice and, extending over forty two kilometres, is the largest ice cave in the world. (thediscoveriesof.com)
May 11: Chill Out Try an interactive ice core model and a walk - in ice cave with crawl spaces for kids in a glacier exhibit opening at the Museum of the Earth in Ithaca, N.Y. (discovermagazine.com)
Depending on the tour you choose, you could also find yourself en route to the town of Grindelwald in a horse - drawn carriage or exploring the warren of ice caves at the summit of the Jungfrau Mountain. (raildiscoveries.com)