Ansupa Lake is the largest and one of the oldest fresh water wetland of Odisha located in Athgarh Forest Division (Banki Sub- Division). Lake is directly linked with the River Mahanadi by a channel called Kabula Nala, through which flood water of river Mahanadi enters the lake. There is another channel Huluhala Nala, which has also an opening to River Mahanadi which acts as outlet. Ansupa Lake is situated between 85-86’ Longitude East and 20-30’ Latitude North.

Water spread area varies from 375 acres to 385 acres. Average depth of water is about 8 to 10 meters at present. Catchment area is 2810 Ha, This Lake is of National importance due to its unique bio – diversity character having varied aquatic fauna and flora and is a famous natural heritage site of Odisha. It harbors large number of fishes, aquatic plants (submerged, floating and emergent types). Different types of resident and migratory birds visit the lake in winter – time, attracting large number of tourists.

 A very old fort called Saranda Fort built during Keshari dynasty is situated near the lake on western side on Saranda Hills. This has some archeological significance.  The hill has old remnants of stone architecture on hill top which are locally known as Armory House, Armory, House Bhai – Bohu Kua, Kansa Kabata . A hillock named Saranda hill runs along the western bank of Lake Ansupa and adds greatly to the scenic beauty of Ansupa Lake. This place has been selected for development of Eco Tourism.  The beauty of meandering river Mahanadi at a distance and water body of Ansupa lake provides great landscape to the visitor from this hillock. Three number of Bamboo Cottages constructed during 2012 – 13 to provide night facility for visitors. There is a Day visitor center on the periphery of lake where pindies for day visitors and boating facilities are also available. The Members of Eco Tourism Group (ETG) of the local VSS is in overall Management and Maintenance of Ansupa Saranda Eco Tourism Site.