These are on the slope of Ölemez Mountain at southwest part of Köyceğiz. They know here a mud cure the skin diseases or also drink the spring water cure intestine problems. The thermal water has 39 celcius degree temperature. The radioactive content of the thermal water is 98.3 based on radon value.
The thermal water is assumed 2.nd rank of the world. The experience of visitors prove that the thermal water is good for skin disease, complaints after surgical operations. the Sultaniye source of welfare is run by the Köyceğiz Municipality and is attainable from Dalyan via Dalyan boat Cooperative boats.