Anadolu Kavağı marks the spot where the Bosphorus loosens its grip and the Black Sea begins. For sailors in antiquity this was a threshold worth fearing: before crossing into open water they left offerings at a shrine to Zeus Ourios, the god of fair winds, and the promontory has carried a version of that sacred name — Hieron, then Yoros — ever since. On the hill above the village stand the broken walls and twin gate-towers of Yoros Castle, raised by the Byzantines to command the strait's narrow neck and later held by Genoese traders and Ottoman garrisons in turn.
Today the village is a fishing settlement at the end of the long Bosphorus ferry line, its waterfront lined with seafood tables and the smell of grilling fish. You climb a steep lane past tea gardens to reach the ruins, where the banded stone-and-brick walls frame a view that explains everything: the two continents pinching together, tankers threading the current, and the strait widening into the pale line of the Black Sea. On a clear day the horizon is all water and sky.