Kyzikos
close to the highway between Erdek and Bandırma
Once a major city of Mysia, first built by Thessalian colonists and later expanded by Romans, ruins of Kyzikos lies just southeast of Erdek, close to the tombolo that connects the peninsula with the mainland, and indeed dates back to the time when the peninsula was still an island.
Zeytin
Zeytin is a small islet covered with pine trees 250 mt off the coast of downtown Erdek. There are some marble ruins on it, including a temple.