Ashtamudi Lake, in the Kollam District of the Indian state of Kerala. It possesses a unique wetland ecosystem and a large palm-shaped water body, second only in size to the Vembanad estuary ecosystem of the state. Ashtamudi means 'eight hills or peaks' in the local Malayalam language. The name is indicative of the lake's topography with its multiple branches. The lake is also called the gateway to the backwaters of Kerala and is well known for its houseboat and backwater resorts. Ashtamudi Wetland was included in the list of wetlands of international importance, as defined by the Ramsar Convention for the conservation and sustainable utilization of wetlands.

Kollam district, is one of 14 districts of the state of Kerala, India. The district has a cross-section of Kerala's natural attributes; it is endowed with a long coastline, a major Laccadive Sea seaport and an inland lake. The district has many water bodies. Kallada River is one among them, and land on the east bank of the river is East Kallada and that on the west bank is West Kallada.