Değirmenburnu (literally "Cape Mill") is situated north of Heybeliada in Adalar district southeast of Istanbul Province.

[1][2] In addition to outdoor activity of hiking and swimming, the nature park offers phaeton riding and bike rental on daily basis.

[2] Historic buildings such as the Heybeliada Sanatorium, the Eastern Orthodox Church Theological School of Halki and a mill are interesting sites in the park area to visit.

[1] The flora of the nature park mainly consists of Turkish pine (Pinus brutia), stone pine (Pinus pinea), maritime pine (Pinus pinaster), blackthorn (Prunus spinosa), bay laurel (Laurus nobilis), Mediterranean cypress (Cupressus sempervirens), southern magnolia (Magnolia grandiflora), Atlas cedar (Cedrus atlantica), Loquat (Eriobotrya japonica), , Mediterranean hackberry (Celtis australis), Judas tree (Cercis siliquastrum), pink rock-rose (Cistus creticus), pink rock-rose (Cistus creticus), Spanish broom (Spartium junceum), common ivy (Hedera helix), Chinese photinia (Photinia serratifolia) and Sally-my-handsome (Carpobrotus acinaciformis).

[2] Animals observed in the nature park are the mammals squirrel, porcupine, hare, mole and the bird species magpie, passer and crow.