Neşet Suyu Nature Park, aka Neşetsuyu Nature Park, is a nature park located in Sarıyer district of Istanbul Province, Turkey.Situated 6km northwest of Bahçeköy neighborhood of Sarıyer and next to the Falih Rıfkı Atay Nature Park, it covers an area of 67.47ha. It was established in 2011, and is one of the nine nature parks inside the Belgrad Forest. The protected area is named in honor of Professor Neşet Bey .Neşet Bey was born in Resen, Ottoman Empire, today in the Republic of Macedonia, in 1881. He taught at the, today Forestry Faculty of Istanbul University, and served as its rector. He was much respected for his works in forestry by his colleagues and students. A memorial marble inscription erected by the Turkish Directorate General of Forestry on September 21, 1953 is situated inside the nature park.In the southwest of the nature park, the Büyük Bent is situated on the Kırkçeşme water canal. Remains of a cistern and the mihrab of an open-air prayer place are registered protected cultural heritage in the park area.