Surrounded by the highest mountains in Switzerland, Zermatt is probably best known as a platform for skiing and mountaineering.the village, the Matterhorn .
The most famous of all Alpine passes, at an altitude of 2,108 meters (6,917 feet) above sea level.
The most visited cave in Europe, and the biggest cave in Slovenia.
327 meters deep and more than 300 kilometers long, this mine is one of the world's oldest operating salt mines.
These four caves, with their weird formations and impressive chambers, are the most famous tourist attraction in Mallorca, Spain.
