Erdek, historically known by its Greek name, Artaki, is the principal town of rugged and wooded Kapıdağ Peninsula, which is connected to the rest of the mainland by a marshy tombolo, and indeed was one of the Marmara Islands only about 2000 years ago.
Erdek was one of the most favoured domestic tourism destinations in Turkey up until 1980s, when more and more people started to "discover" Mediterranean and Southern Aegean coasts, further afield from major population centres of the country. However, Erdek is still quite one of the major domestic summer resorts, especially for mid-class families.
Tourism Information Office (Turizm Danışma), ☎ +90 266 835-11-69. edit
Erdek is close to Bandirma, so one of the easiest ways to get to Erdek from Istanbul is to take one of the fast ferries operating between Istanbul and Bandirma, and then to catch a minibus to Erdek (which takes 20 minutes to get to from Bandırma).
Zeytin (Zeytin Adası). 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.edit
Kyzikos (Cyzicus), (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.edit
Ant Camping, Düzler Mevkii (on the Erdek-Bandırma highway, 6 km southeast of Erdek), ☎ +90 266 855-70-44 (mobile:+90-533-696-90-44, firstname.lastname@example.org), . RV-camping in a pine woods right on the beach. Power hook-ups, kitchen, wireless internet, and washing machines are available.€12 per caravan/night, including two adults. edit