Belgrad Forest, Mixed deciduous forest in Eyüpsultan, Turkey.

Belgrad Forest is a mixed deciduous woodland of about 5,500 hectares at the eastern end of the Thracian Peninsula, divided between the Sarıyer and Eyüpsultan districts. Sessile oak is its dominant tree, and the canopy closes over a green understory of shrubs and grasses. A narrow paved road curves between wooded banks, and six historic Ottoman dams lie within the forest.

Suleiman the Magnificent deported thousands of Serbs from Belgrade to Thrace after the 1521 siege, settling them in the abandoned Byzantine village of Ayvat inside the forest; the village and later the woodland took the name Belgrad. From 1554 the court architect Sinan repaired and built water structures there, and three more dams were added in the late 18th century, with general repairs in 1839.

The forest's name comes from the village of Belgrad, settled by Serbs deported after the 1521 siege of Belgrade; the village was later moved by sultan's order when its residents polluted the springs. Today seven main picnic areas serve Istanbul residents, the most popular being Büyük Bent, where portable barbecues are allowed.

The forest has several entrances and jogging paths with exercise equipment for exploration. Bring sturdy shoes and plenty of water, as the ground conditions vary depending on the season.

The forest holds historical water structures from Ottoman times, including dams and aqueducts that once supplied water to Istanbul's people. These old works remain visible today and show the engineering skills of the past.