Sasthamkotta Lake is a freshwater lake located in the state of Kerala, India. It is the largest and the only naturally occurring freshwater lake in the state. The lake is situated in the Kollam district of Kerala and covers an area of around 375 acres.

Sasthamkotta Lake holds significant ecological and cultural importance. It is surrounded by hills and forests, making it a picturesque location. The lake is also considered a sacred place by the local people and is associated with the Sastha temple located on its western banks. The temple is dedicated to Lord Ayyappa, and the lake is an integral part of the temple’s rituals and festivals.

One of the unique features of Sasthamkotta Lake is its water composition. The lake’s water is considered to be potable and is said to have medicinal properties due to its high mineral content. People believe that the water of the lake has healing powers and can cure certain ailments.

The lake also supports a variety of flora and fauna, including different species of fish and aquatic plants. It serves as a habitat for both resident and migratory birds, making it a popular spot for birdwatching.

Over the years, there have been efforts to conserve and protect the ecological balance of Sasthamkotta Lake due to its ecological and cultural significance. The lake and its surroundings attract tourists and devotees alike, making it an important destination in Kerala’s tourism landscape.