Pamukkale is well worth a visit. We drove and stopped off at the great ruins at Aphrodisia for the afternoon, then on to Pamukkale and a hotel looking straight up at everything: very photogenic. You'd need to stay 2 nights. It will be busy at peak times, but the beauty of staying is that you can be there out of bus trip hours! We visited on our second day via the adjoining archaeological ruins and stayed until the sun went down, no-one around and glorious as the sun set on the rock formations. The following day we meandered back to Calis via onyx factories and villages. A lovely break. We went in October but I believe it's very crowded in summer. Only thing I would say was we didn't find good food for the evenings. As most people are day trippers seems they are less geared up for the food side.
