Located on a tectonic hole, between Izmit Bay and Adapazari Meadow Lake Sapanca is one of the few lakes in Turkey, which provides drinking water. The region around Sapanca, surrounded by mountains in the south and small hills in the north, has become very important for day trips and weekend vacations with its charming natural beauty. Unfortunately, due to its proximity to the metropolitan area of Istanbul the Lake is exposed to pollution and to heavy urbanization. The forest area near to the coast of Lake Sapanca's south slopes has been heavily damaged and has left space for new kinds of small trees like maquis. Nowadays there are no more significant forest areas surrounding Lake Sapanca.