Lake Burgas (Bulgarian: Бургаско езеро, Burgasko ezero) or Lake Vaya (езеро Вая, ezero Vaya), located near the Black Sea west of the city of Burgas, is the largest natural lake in Bulgaria, with an area of 27.60 km², a length of 9.6 km and a width of 2.5 to 5 km.