Wieliczka Salt Mine327 meters deep and more than 300 kilometers long, this mine is one of the world's oldest operating salt mines.
Postojna CaveThe most visited cave in Europe, and the biggest cave in Slovenia.
Sacred Monkey Forest SanctuaryThis forest in Bali is home to 300 long-tailed Balinese Macaques, just waiting for you to give them some treats.
Sian Ka'an BiosphereA unique area in the Mexican Caribbean, with a natural landscape, rich flora and fauna and miles of pristine beaches.
Tonle Sap LakeDuring the wet season, Tonle Sap river becomes the largest freshwater lake in Southeast Asia. This is a sight to see.
Everglades National ParkAn International Biosphere Reserve, a World Heritage Site, and a Wetland of International Importance.
Belize Barrier ReefThe second largest barrier reef in the world, a place where you can observe nature at its best, but unfortunately threatened to disappear.
St. Gotthard PassThe most famous of all Alpine passes, at an altitude of 2,108 meters (6,917 feet) above sea level.