Sri Lanka government reports said about ten natural hot water springs have been discovered in a scenic area close to the foothills of Dimbulagala hills in Plonnaruwa district. Dr. S.D.Dharmagunawardena, a geologist who conducted experiments at the hot springs said, “the hottest spring in the area has water heated to about 61 degrees Celsius.” He said the heat is a remarkable one for a hot water spring.
http://www.lankaweb.com/news/items/2009/07/17/six-hot-water-springs-are-discovered-in-polonnaruwa/