Bosphorus is the most scenic and the most romantic part of Istanbul. It is a strait that connects the Black Sea on north with the Marmara Sea on south. It is a natural border between Europe and Asia and it is the only outlet of the Black Sea, which is connected to the Aegean through the Bosphorus and the Dardanelles. The most beautiful mansions and palaces of Istanbul, mosques restaurants and beaches along its shores are located on two sides of this natural waterway. There are two suspension bridges that are illum....istanbul dinner cruise,istanbul boat tours.