If you're planning a bit of sightseeing during your trip, head to Theater of Miletos— just one of the landmarks located 6.1 mi (9.8 km) from central Didim.
If museums are on your list of things to see in Didim, then you might want to head to Miletus Museum. If you want to experience more of the culture Didim has to offer, head to Miletus Ruins.