Plitvice lakes are first National park in Croatia established in 1949. The park covers 296 km2 of unique natural splendor. The park became protected by UNESCO’s in 1979, in recognition of its outstanding natural beauty and undisturbed production of travertine through chemical and biological action. The Plitvice lakes represent a phenomenon of karst hydrography. The park harbours a grand collection of waterfalls, gallery of lakes, forest and diversity of animal life. The lakes are renowned for their distinctive colors, ranging from azure to green, grey or blue. The colors change constantly depending on the quantity of minerals or organisms in the water and the angle of sunlight. The sixteen lakes which are formed by natural dams of travertine are separated into upper and lower lakes. About eight km of pathways and wooden walking trails around lakes are accessible to visitors. Trails are descending from an altitude of 636m to 503m above sea level. The Park is situated in central Croatia, in region of Lika. Plitvice Lakes Park is recognized as an astonishing natural monument for the benefit and enjoyment of travelers. The Plitvice lakes continuously provide inspiration for visitors as one of Croatia’s most popular natural attraction. Million of people from all over the world visit the Park every year. Hiking is a common activity with organized programs for park visitors, other possible activities include: electric boat and train ride, rowing, cycling and skiing.