Mistery of The World- 14.
In Pomukkal, which means "Palace of cotton", a natural location in the southwestern province of Denzilli. The area is famous for its natural warm water and huge white complexes of Travertine, which is mainly made of water flowing through carbonated minerals. There are 17 natural warm water bodies in this area.
From 2th century BC to this day, this area near Dingleili is a desirable destination for those who want to benefit from these warm water ponds rich in minerals. At present, the remains of the ancient holy city of Hierapolis are present, but the scenery of the "Tular Palace", the scenic beauty of the mountain peak and the stagnant white springs are truly enchanting.
Source: https://m.priyo.com/articles.