Hierapolis is an ancient city located on the top of Pamukkale and is a World Heritage site. The hot springs of Pamukkale were used as a spa since the 2nd century, people came to Hierapolis to soothe their ailments and often retire and die. Remains of the Greco-Roman period include baths, temple ruins, a monumental arch, a nymphaeum, a necropolis and a theatre. Cleopatra’s pool, according to legend, was a gift from Marcus Antonius . In the 7th Century, an earthquake toppled the surrounding building and the massive marble columns tumbled into the pool – where they rest on the bottom to this day and visitors can swim among them.