If you are quite sure to visit Turkey then personally visit few of the Beaches which are crowd-free beaches (Not over crowded), from hidden bays to pristine secluded coves.
Ovabuku - Tucked away on the Datca peninsula, Ovabuku is the prettiest in a sequence of three bays, along with Hayitbuku and Kizilbuk. The beach is a comparatively small stretch of creamy shingle Butterfly Valley - enormously situated between two towering cliffs, Butterfly valley stretches out in a v-shape, ending in a sweep of pristine beach. Most visitors access the beach by boat from Olu Deniz or Fethiye, but for adventurous trekkers there is a rocky path that leads down from the road.
Gemiler - It's hard to believe that Gemiler lies just a short way away from the heavily overpopulated Olu Deniz beach; it's rarely crowded and reached by boat or bus ride from Hisaronu, through the fertile Kaya valley, past tobacco and wheat fields and out to the very tip of the Fethiye peninsula.
Hisaronu Bay - Not to be puzzled with the neon-lit nightmare resort above Olu Deniz, Hisaronu Bay has two small beaches that look out towards the Datca peninsula. Behind the beach lies the kind of resort that feels like Turkey 20 years ago; a clutch of restaurants and simple pensions dotted along quiet country lanes