🇹🇷Pamukkale, Turkey.
Pamukkale in Turkey is a famous thermal spring located in the southwestern part of the country. There is an extremely high amount of calcium carbonate in its water, which over the millennia has helped to form natural terraces, baths and stalactites. 
Nearby are the ruins of the ancient Greek city of Hierapolis. Together, they have long been included in the famous UNESCO list and represent a huge tourist center of Turkey, visited annually by millions of tourists.
https://goo.gl/maps/M6jCvnnWGSc6GqdG9