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As visitors approach the foothills of the Cokelez Mountains in Southwestern Turkey, their eyes meet an extraordinary site. A vast white cliff 200 metres above the brown valley stands out with white terraced pools that look like frozen waterfalls. It appears [ ] a magical cloud or a giant ball of cotton. The Turkish people call this natural wonder "Pamukkale" [ ] cotton castle. Calcite rich hot springs, that originate from a crack in the earth's crust, create fantastic shapes and forms in the side of the cliff. Fresh deposits of calcite give the pools of water and surrounding formations their white surface. To ancient societies such natural beauty meant the place was sacred to the gods. At the end of the 2nd century BC, the Romans [ ] the spa city of Heirapolis around the thermal pools. Ruins of the ancient city's streets, temples and baths [ ]. Back then, people came from faraway places to bathe in the thermal pools which they believed had great healing powers. People today still believe this and come to bathe in the pools. At the top of the step-like terraces there is a large pool called the 'Sacred Pool'. Here the water temperature ranges from 42-56°C. The pools on the lower level terraces are shallower and [ ] with water temperatures ranging from 36-38°C. Besides [ ] the warm waters and magical atmosphere of Pamukkale, many people come to the waters hoping to treat and cure various skin conditions and diseases, such as arthritis. Whether it's for its healing powers or its incredible beauty, Pamukkale is a natural wonder everyone should [ ].