Pamkukkale - Hierapolis, a UNESCO World Heritage Site, is located in the southwest of the country, in the province of Denizli. Nearby, the ancient Greco-Roman city of Hierapolis can be visited. The name "Pamukkale", meaning "cotton castle", is one of the most visited tourist spots in the country. A trip to Turkey without discovering Pamukkale would be considered incomplete. Pamukkale is a geological wonder made of hot water basins formed by white limestone,it is surrounded by SPA centers which offer mud baths and thermal baths.  For nature lovers there is no more mesmerizing landscape than Pamukkale: the limestone basins on the mountainside make you think of frozen waterfalls, but the water is actually  37 ° C. Created thousands of years ago the Hierapolis spa was first opened in the 2nd century BC by the King of Pergamon. The visit is subject to a few regulations in order to preserve the site: wearing shoes is prohibited. However, the place is well laid out and a wooden path goes around the site in complete safety. You can soak your feet in the basins or even take a dip!