Bosporus

The Bosphorus (/ˈbɒsfərəs/ or /ˈbɒspərəs/) or Bosporus (/ˈbɒspərəs/; Ancient Greek: , Bósporos; Turkish: Boğaziçi, pronounced [boːaziˈt͡ʃi]) is a narrow, natural strait and an internationally significant waterway located in northwestern Turkey. It forms part of the continental boundary between Europe and Asia, and separates Asian Turkey from European Turkey. The world's narrowest strait used for international navigation, the Bosphorus connects the Black Sea with the Sea of Marmara, and, by extension via the Dardanelles, the Aegean and Mediterranean Seas.