Chitwan National Park was the first and most famous of all National Parks in Nepal. It is situated in the foothills in the Inner Terai region bounded by sivalik hills. Chitwan National Park is listed in the UNESCO World Heritage Site (natural) List. The main reason for visiting Chitwan National Park is to view the one horned rhino and other tropical wildlife such as leopard, various kinds of deer, sloth bear, wild boar, fresh water dolphin and crocodile. There are over 450 species of birds, and the elusive Bengal tiger. It has often been called one of the finest wildlife experiences in Asia.