The Fenerbahçe Lighthouse, a historical lighthouse still in use, is located on the northern coast of Sea of Marmara at Fenerbahçe neighborhood of Kadıköy district in Istanbul, Turkey.
Wikipedia https://en.wikipedia.org/wiki/Fenerbahçe_Lighthouse
Address Fener Kalamış Caddesi, Kadıköy 34726, Turkey
Coordinates 40°58'5.303" N 29°1'55.213" E