Lake Volvi, a natural lake in Northern Greece. is the second largest natural lake in Greece with an area of 68.6 square kilometers.
Lake Volvi lies in a depression between the Chalkidiki peninsula and the Stratoniko and Chortiatis massifs in the south and the Vertsikos and Kerdilio mountain ranges in the north. The valley of Rendina connects to the lake in the east, and to the west the lake is separated from Lake Koronia by a headland.
Source: Wikipedia