I visited the hot spring mentioned here last week. It is near by Dimbulagala anciant site. Take the road from Polonnaruwa to Ampara and turn off the road to Nelumwawa village near Manampitiya junction. It is situated in middle of the lake Borawawa. (Bora is muddy, wawa is lake) Now govrnment is preparing this place as a tourist attraction. I will make a page in my website www.srilankatrekking.com but it has a page of hot springs in Sri Lanka as well.