Situated in the Region of Lika, in the part of Croatia that is due to its exceptional natural beauties used to be called Devils Garden, Plitvice Lakes are truly a small piece of Heaven on Earth. Many times proclaimed as one of the most beautiful places in the world, 16 lakes and their waterfalls are among most visited and popular sights of Croatia. National Park is inhabited by many protected plant and animal species so all the visitors are kindly asked to respect the rules concerning the ecology, flora and fauna. Plitvice Lakes are also Croatian oldest National Park and only Croatian natural sight in the UNESCOs World Heritage Register. Lakes are divided into the Upper and Lower Lakes. Their characteristic is water saturation with dissolved calcium carbonate that in combination with the force of water dispersion creates travertine.