The Bosphorus is a natural strait and internationally-significant waterway located in northwestern Turkey that 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 Bosporus connects the Black Sea with the Sea of Marmara, and, by extension via the Dardanelles, the Aegean and Mediterranean Seas.
We could see it from our hotel's breakfast room, and on one occasion spotted a Soviet submarine sailing along the surface up toward the Golden Horn. We took a pleasant boat ride along it and landed for lunch on the Asian side of Istanbul. It was Camille's first opportunity to set foot on the Asian continent.