datca3 - Nearby Places

If you are still have the energy after trying the many things to do mentioned above, you can visit Bozburun, Orhaniye, Selimiye, Bayir village Sogut all about 50-60 km away from Datca.
Marmaris, which you passed through on your way to Datca, is 70km and there is an hourly shuttle service during the summer months. Bodrum is a 1.5 hr ferry ride, they leave daily.

If you have a Shengen visa you can participate in organized tours to the Greek islands.