It is seen that marble has been mined as a raw material from Antiquity until today in this city, which is famous for its antique marble quarries around Saraylar on the north of Marmara Island. B.C. Founded in 844 as a colony of Prokennesos Miletus, it has gained a reputation for centuries of marble. Prokonnesos marble. 4th century. It was also used in the columns of the famous Artemis Temple of Ephesos and in the palace of the Halicarnessos Satrap Mausolos. In addition, Prokonnesos played an important role in meeting the marble needs of the Roman Emperor.
Today, Roman, Byzantine and Ottoman period historical artifacts are partially available on the island. Many marble works exhibited in the Istanbul Archeology Museum were made with the marble of the island in the Roman and Byzantine Periods. With the earliest finds dating back to the 2nd - 3rd centuries, it is said that marble has been extracted from marble quarries for exactly 1800 years. The marbles extracted from here are world famous. In addition, there is an open air museum in the Saraylar District of Marmara Island.
Marmara Island center and Saraylar Neighborhood have beautiful beaches. Kole Beach, Aba Beach, Manastir Beach, Abros Beach, Küçükkum and Büyükkum beaches are popular places for vacationers.
Asmalı village is the last Istanbul departure point of the island, it is very suitable for yacht tourism. In addition to tourism, olive and fishing are well developed. It is seen that the old wooden Greek houses are still in use.
One of the villages connected to the center in Marmara Island is Çınarlı village. Although the village attracts the attention of tourists, it has a lively and lively summer season. The name of the village comes from the famous plane trees.
The origin of its name, Avşa, known as "Ophiussa" in the works of historian Plinius, is one of the islands formed in the middle of the Marmara Sea, on the extension of the Kapıdağ Peninsula, and is a district of the Marmara district.