Some places to visit.
Perge, Düden waterfalls,Kursunlu waterfalls,Ataturk house,Museum ,cable car ride near Kemer, Lara beach.Ataturk parki.Side.Aspendos.Cam pyramid for cultural events.Termessos.The caves at Kahrain.
Don't do a boat trip. They are rubbish compared with what you get in Fethiye!