Pamukkale is a unique geological site located in southwestern Turkey, near the city of Denizli. The site is famous for its white mineral terraces, formed by hot springs that have deposited minerals over thousands of years. The terraces resemble cascading tiers of white cotton, hence the name "Pamukkale" which means "cotton castle" in Turkish.

The main attraction at Pamukkale is the travertine terraces, which are made of limestone deposited by the hot springs. These terraces are considered a natural wonder and are recognized as a UNESCO World Heritage Site. Visitors can walk along the terraces, dipping their feet in the warm mineral pools and taking in the stunning views.

In addition to the terraces, there is also an ancient Roman spa complex, called Hierapolis, located at Pamukkale. The complex was built during the Roman Empire and was used as a thermal spa. Today, visitors can explore the ruins of the complex, including a theater, temple, and Roman baths.