Gypsy beach is a good one - check our the excursions page (link at the top) to see some of the other things. You could do the walk into
Marmaris and get the water taxi back (or vice versa), get the water teaxi to Turunc and dolmus back, go and have a proper Turkish breakfast at places like Asparan or Cinar, or how about the walk to the flag? Just a few suggestions....