The ancient Greek/Roman ruins of Didyma are located a short distance to the northwest of modern day Didim.
Here lay the ruins of the temple of Apollo. Surrounding the temple are fields of ruined marble and several impressive pieces of sculpture, including the head of Medusa.
In ancient times Didyma was the largest and most significant Sanctuary on the territory of Miletus. To approach it, visitors would follow the Sacred Way to Didyma, about 17 km long. Along the way, were ritual waystations, and statues of members of the Branchidae family, male and female, as well as animal figures. Some of these statues, dating to the 6th century BC are now in the British Museum.