Peljesac, a peninsula in southern Dalmatia, extends parallel to the Adriatic coast and stretches between Neretva in the north and the Bay of Mali Ston in the east (between which there is the so-called Little Sea), and Mljet in the south and the Pelješac Channel in the west. Peljesac is the largest Adriatic peninsula after Istria.
It is 65 km long and covers 348 square km of the surface. It is separated from the mainland by a 1450 m narrow Ston overhang, which separates the Maloston and Ston Channel, in fact, the bays which are named after the canals because they are deeply cut into the mainland. Fertile valleys and rocky hills alternate on the peninsula, with the highest peak being St. Elijah – 961 m above sea level. Pelješac is full of many islands and islets.