It was converted to a hospital during Roman period. 'No death came in the name of the goddness' was written at the entry of the hospital. You can find healing waters in Sultaniye Village which can be driven to by Ekincik-Koycegiz road with the most beautiful scenery. It is a fantastic holiday village to have a rest with 112 various kinds of birds, greenery pine forests and healing thermal springs. Sultaniye thermal spring and mud baths help treat rheumatism, kidney and urinary tract disorders, mental fatigue, skin diseases and gynaecological diseases.    
It is the world’s second biggest radioactive thermal spring! after the one in Indonesia. It is located to the east of Olemez Mountain in Sultaniye Village. It is determined that many various sources of thermal springs have been found around Olemez mountain.The water contains calcium chloride, calcium sulphate, calcium sulphide and radon. The water temperature is 39 degrees and you need to go through a 21 day treatment. You start with two baths a day that take 10 minutes each.
Tourists staying in places like Koycegiz, Dalyan and Ekincik stop by Sultaniye Thermal Spring either by land or by boat trips. During the 45 minute stop at the thermal spring, the tourist go into the thermal waters in the big pool, they then go into Koycegiz Lake whist some of them just sit in the cafe. The turkish people use the thermal facilities until the boats arrive at 16.00. One of the pools is round-shape and  the other is square-shaped pool.  The small pool is available just for women in the morning. The springs source next to big pool is drinkable and it is said that it is useful for liver, gallbladder, intestine problems.
How to reach? If you are driving to Sultaniye, following the Mugla-Antalya road and approaching Koycegiz, you should take the Dogusbelen junction and proceed in the direction to Ekincik. Then you will reach the thermal spring after you take the Sultaniye Thermal Spring turn and follow the 500 m earth road.