Tümbüldek Thermal Spring is located in the Turkish city of Bursa, and is considered one of the most important archaeological attractions in it. A Turkish bath was built near it to benefit from its water, but due to the conditions and changes that have occurred, only some ruins remain today. Tourists come to the spring for treatment, as the water temperature here reaches 50 degrees Celsius, and it is believed to be beneficial for many diseases, especially rheumatism and some other skin diseases!