Ansupa Lake is the largest and one of the oldest fresh water wetland of Odisha located in Athgarh Forest Division (Banki Sub- Division). It spreads over a vast area of 141 hectare, and is surrounded by Saranda Hills.Lake is directly linked with the River Mahanadi by a channel called Kabula Nala, through which flood water of river Mahanadi enters the lake. 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.