Acarlar Floodplain Forest Acarlar Floodplain Forest is a combination of seaside, lagoon, dunes and forest located in Sakarya Province. Located between Karasu and Kaynarca, Acarlar Floodplain Forest is Turkey's largest mono-bloc floodplain forest. Its distance to Karasu is around 26 km (16 mi) and to Sakarya around 50 km (31 mi). Around the area, there are five villages of Karasu district and three of Kaynarca district. Sometimes called lagoons, inundated coastal terrain is created by sand barriers that form between the sea and land. This lagoon is located on the border of Karasu-Kaynarca District and about 700 m (2,300 ft) from the sea; it covers 1,562 ha (3,860 acres). The area features deep water which can reach up to around 1.5 meters (4.9 ft) deep in some areas during summer months when less rainfall occurs. The floodplain is bordered in the north by high sand dunes at the Black Sea, and in the south by low hills that are 100 m tall on average. Excess water over flood stage flows into Okçu Creek which joins Sakarya River 6 km away to the east. Local flora and fauna live in the Acarlar Floodplain Forest. Plus, it is a breeding and overwintering center for migratory birds.