This vast fresh water lake surrounded by hills on three sides. Sasthamkotta Lake, situated 19 km from Kollam in the beautiful village of Sasthamkotta, is the largest freshwater lake in Kerala and serves the drinking water needs of about half a million people of the Kollam district. Sasthamkottah lake is called the queen of lakes. The ancient Sastha Temple which lends its name to the town, is an important pilgrim centre dedicated to Lord Ayyappa, which serves as an important pilgrim centre drawing many devotees on a daily basis. There are frequent bus services from Kollam city. Accommodation is available at the PWD Rest House.