Covering an area of 1,562 hectares, Acarlar Lake is one of the important tourism centers of Sakarya. Acarlar Lake Floodplain Forest is a first degree natural protected area. Acarlar Floodplain, which is located within the protection zone, dries up in summer and forms with water accumulation in winter.

The area of the floodplain is 1,562 hectares and its depth is up to 1.5 meters. The lands of the floodplain, whose waters recede in summer, are used as agricultural land by the villagers. The floodplain is completely surrounded by ash forests and these trees occasionally penetrate into the marshy parts of the lake. 

Animals such as pheasants, woodcock and wild ducks live here and freshwater fish are hunted. The fish species coming out of the floodplain are catfish, red wing, carp, pike, pike, oklama and many other fish species.

Acarlar Floodplain is also home to around 2300 plant species. Water violet, water tulip and various colored water lilies are some of them. There are also boat and water bike tours in the floodplain.