Cleopatra bathed in the Antique Pool at Hierapolis--before a great earthquake knocked several pillars into the pool. Fed by natural spring, the warm water is said to have healing qualities. My kids and I enjoyed the bubbles; they stick to skin and give the water a sharp taste. After trekking through many ancient cities, these columns were far more fascinating to me underwater.
We trekked up the travertines of Pamukkale, hiked the ancient sites of Hierapolis (which include a large amphitheater and a Martyrium where St. Phillip is said to have been martyred and later buried--and an interesting octagonal structure was built). We ended the day swimming in the Antique Pool--a relaxing way to end the sun-infused, hike-filled day. The crowds in the pool were thinner by that hour, too. We hiked down the hill, again past the beautiful white travertines, as yummy yellow light disappeared behind the mountain.