Sultan Ahmed Dam, also known as the “Topuzlu Dam” (Turkish: Topuzlu Bendi) was built in 1619, and the construction of the dam was ordered by the Ottoman sultan Ahmed III (30 December 1673 – 1 July 1736).
Topuzlu dam is located in the Belgrade forest. I took these photos and the video below on March 31, 2019. It was a cold and foggy day.
Related: Sounds of a misty lake