Bosphorus forms part of a boundary between Europe and Asia.
 It also connects various seas along the Eastern Mediterranean, the Balkans, the Near East, and Western Eurasia
=== Present morphology ===The limits of the Bosporus are defined as the line connecting the lighthouses of Rumeli Feneri and Anadolu Feneri in the north, and between the Ahrkap Feneri and the Kadky nciburnu Feneri in the south ("Fener" is Turkish for lighthouse)

