If you have more time in Istanbul, consider taking a Bosphorus Cruise or visiting the Topkapi Palace. If you have less time in Cappadocia, opt for either the hot air balloon ride or visit the Goreme Open Air Museum. If you have more time in Pamukkale, you can explore the Cotton Castle's natural beauty further or relax at a hot spring. And if you have less time in Antalya, you can forego visiting attractions and opt for a walk in the old town and along the marina for a more relaxed day.