Twenty thousand lake ( Bis Hajari Lake) situated inside the Chitwan National Park , Nepal. It is registered in World Wetland Site( Ramsar site) in the habitat of many aquatic plants and animals. Gharials and other reptiles are found here. It is also the source of water to Khageri irrigation project which irrigate most of the part of western site of Chitwan. many organisation and local bodies are working for protecting the site.