Big Akgöl

Büyük Akgöl is a freshwater alluvial dam lake located within the boundaries of Sakarya province, between the districts of Karasu and Ferizli. It is located 38 kilometers from the center of Sakarya province via the village of Gölkent, which belongs to Ferizli. The villages of Gölkent, Kuzca, and Bakırlı, all under Ferizli district, and Adatepe, Konacık, and Kancalar, under Karasu district, surround the lake.

^{Büyük Akgöl} (Sakarya İl Kültür ve Turizm Müdürlüğü)

The lake was formed by alluvial deposits carried and accumulated by the Sakarya River, which flows approximately 2.5 kilometers away. The total surface area of Büyük Akgöl is 19 km², with a drainage basin of 47 km². Its maximum depth measures 6 meters, and the highest water level reaches 4 meters. A large portion of the lake consists of reed beds and marshlands; therefore, accessible open areas along the shoreline are very limited.

^{Büyük Akgöl} (Sakarya İl Kültür ve Turizm Müdürlüğü)

Scientific studies have determined that the lake’s water quality is classified as Class IV and that the lake is experiencing intense eutrophication (excessive enrichment of water with nutrients).

The wetland status of the lake supports a diversity of aquatic life. Species such as crayfish, freshwater bream, tench, roach, carp, velvet fish, tahta fish, mirror carp, silver pond fish, and chub inhabit the lake and are subject to fishing. Additionally, commercial extraction of peat (organic soil) takes place along the lake’s shoreline facing Karasu district. Analyses have confirmed that the peat obtained from Akgöl is of equal quality to imported peat. A bird observation tower has also been constructed to monitor bird species in the region.

Access to the lake is provided via all-weather asphalt roads. An alternative route passes through the village of Adatepe along the old Karasu road. While there are specialized restaurants and settlements around the lake to meet food and beverage needs, basic infrastructure such as toilets, seating areas, and drinking water facilities are absent at the picnic spots surrounding the lake.