Antique Pool, Hierapolis

Swimmers float over toppled marble columns in the Antique Pool, a spring-fed pool among the ruins of Hierapolis, just above the Pamukkale terraces. The columns are generally said to have fallen in during an ancient earthquake, and the water stays around 36°C (97°F) all year. It is often called Cleopatra's Pool, though she has no known connection to it, and swimming costs extra on top of the site ticket.