Pamukkale is a natural site in Denizli Province in southwestern Türkiye. Pamukkale is one of the Türkiye’s top attractions and a precious in the world with its cotton -look terraces. The most famous tourist attraction in the town is Pamukkale Travertines. They were formed as the hot water from springs which has rich calcium hydro-carbonate loses its warmth and gives carbon-dioxide and carbon monoxide  to the air , as a result the calcium carbonate is precipated. The other tourist attraction is Hierapolis, its an ancient Roman spa city that founded around 190 B.C. Pamukkale has around 2 millions visitors every year. Traverting and Hierapolis  are recognized as UNESCO World Heritage Site in 1988.