Didim is a municipality and district of Aydın Province, Turkey. Its area is 424 km², and its population is 97,000. It is a popular seaside holiday r…Didim is a municipality and district of Aydın Province, Turkey. Its area is 424 km², and its population is 97,000. It is a popular seaside holiday resort on the Aegean coast of western Turkey, 123 km from the provincial capital city of Aydın. Didim is the site of the antique city of Didyma with its ruined Temple of Apollo.