Beykoz Info
Beykoz, also known as Beicos and Beikos, is a district in Istanbul, Turkey at the northern end of the Bosphorus on the Anatolian side. Beykoz includes everything from the streams of Küçüksu and Göksu up to the opening of the Bosphorus into the Black Sea, and the villages in the hinterland as far as the river of Riva.
Wikipedia