Side is an ancient Greek city on the southern Mediterranean coast of Turkey, a resort town and one of the best-known classical sites in the country. It lies near Manavgat and the village of Selimiye, 78 kilometres from Antalya in the province of Antalya.
It is located on the eastern part of the Pamphylian coast, which lies about 20 kilometres east of the mouth of the Eurymedon River. Today, as in antiquity, the ancient city is situated on a small north-south peninsula about 1 kilometre long and 400 metres wide.
The great ruins of Side are among the most notable in Asia Minor. They cover a large promontory where a wall and a moat separate it from the mainland. During medieval times, the wall and moat were repaired and the promontory houses were built.
There are colossal ruins of a theatre complex, the largest of Pamphylia, built much like a Roman amphitheatre that relies on arches to support the sheer verticals. The Roman style was adopted because Side lacked a convenient hillside that could be hollowed out in the Greek fashion more typical of Asia Minor. The theatre is less well preserved than the theatre at Aspendos, but it is almost as large, seating 15,000–20,000 people.