The Vis Archipelago UNESCO Global Geopark is located off the coast of Croatia, formed by some of the oldest rock in the Adriatic Sea. The northeastern region of the archipelago features large sand deposits formed by fierce winds in the Ice Age, which also created several unique caves and land formations. Before the sudden rise of the sea level around 12,000 years ago, these islands were much larger and extended more than 20 miles. In this extended area, called the Mala Palagruža, archaeologists discovered flint quarries that served for the production of early tools, believed to have been made by the islands’ first inhabitants up to 8,000 years ago. Some of the most famous sites on this Archipelago are the Blue Cave (Modra špilja) and the Monk Seal Cave (Medvidina špilja).