For a first timer who charter a yacht in Turkey, the area around Gocek is beautiful. Marmaris-Fethiye-Marmaris as well Gocek-Kas-Kekova-Gocek cruise is a good mix of nature and history, when Bodrum has a lot of nature to offer.  Antalya - Kekova covers many ruins. Another itinerary may be Bodrum-Didim-Bodrum. You may add daily tours to Miletus, Dydima, Priene and Ephesus during this cruise.