Koycegiz (pronounced 'kur-y-jeez') is a wonderful off-the-beaten-track town near Dalaman airport, on a beautiful lake with its own hot springs and mud bath. My family and I stayed there in Villa Jasmine, and had an excellent holiday. We enjoyed its private pool, but also went on a fab boat trip across the lake to the Mediterranean sea. Really recommend it as a holiday spot away from the crowds.
Forgot to say it's in south-west Turkey, near the famous Turquoise Coast.