Pamukkale, which translates to “Cotton Castle”, is a natural site in southwestern Turkey. The white terraces here are made of travertine, and not salt, which is a sedimentary rock deposited by water flowing from the hot springs. The water from the hot springs are supersaturated with calcium carbonate and when the carbon dioxide de-gasses from it, the white calcium carbonate is deposited as a soft jelly that eventually hardens into travertine. People have bathed in these pools for thousands of years.
Because of the healing properties of these pools, the ancient city of Hierapolis was built on top of the terraces and used as a spa since the 2nd century BC. Hierapolis together with Pamukkale was made a UNESCO World Heritage Site in 1988. Tourists are now only allowed into the smaller pools and must remove their shoes to protect the deposits.
Aphrodisias was a small Greek city named after Aphrodite, the Greek goddess of love. It is best seen on the way to or from Pamukkale.