(worldkings.org) Ice caves are the amazing wonders of nature, hiding under the glaciers. Many tours to the glaciers include visiting the caves. Some caves are not open for everyone, since they are difficult to navigate. However, many of them were discovered by the fearless adventurers. If you are going to visit any ice cave that is not monitored by any tourist service, you have to remember that it may collapse any time, so be extra careful.