Plitvice National Park in Croatia is considered to be one of the most beautiful natural sights in Europe. Due to its natural beauty and significance, this system of 16 interlinked lakes and a large forest complex around it were set aside as a national park in 1949. In 1979 the park was inscribed on the UNESCO World Heritage List. The Plitvice Lakes basin is a geomorphologic formation of biological origin, a karst river basin of limestone and dolomite, with approximately 20 lakes, created by the deposition of calcium carbonate precipitated in water through the agency of moss, algae and aquatic bacteria.