Near the West Bali National park, in the middle of mangrove forest on the edge of the beach, you can find Banyuwedang hot spring. The hot water is under water at high tide. To keep the hot water at high tide not mixed with seawater they have build a concrete wall in the form of a circle.
It is he largest hot spring in Bali which contains sulphur. The average temperature is around 40 C. Because of its sulphur it is believed to cure a lot of disease especially skin diseases.