Pamukkale, home to the famous gleaming white calcium terraced pools. Known locally as the Cotton Castles, they are a gift of Mother Nature. It was formed when warm, calcium-rich mineral water cascaded over the cliff edge, cooling and depositing in the process. The calcium built natural shelves and pools on the cliffs, known as travertines. You shouldn’t leave Pamukkale without having a healing dip in the sacred fountain of Cleopatra’s pool.