Turkey is home to seven distinct geographic regions: Aegean, Black Sea, Central Anatolia, Eastern Anatolia, Marmara, Mediterranean, and Southeastern Anatolia. The Aegean Region lies on the western side of Turkey. It is bound by the Aegean Sea to the west; Marmara Region to the north; Mediterranean Region to the south; Central Anatolia Region to the east. Among the four coastal regions, the Aegean Region has the longest coastline.
