To Istanbul, the places to visit are the Sofia Church, the Old Palace, and the Bosphorus. The Bosphorus Strait is also known as the Istanbul Strait, the Black Sea in the north, the Marmara Sea in the south and the Mediterranean Sea in the south, separating Turkey into two parts: Asia and Europe. The strait is30.4 kilometers long, the widest is 3.6 kilometers, the narrowest is 708 meters, the deepest is 120 meters, and the shallowest is only 27.5 meters. The two sides of the Strait are picturesque and the buildings of various styles are scaled up. Sitting on the boat, you must bring some steamed bread. Seabirds circle around and feed seabirds is very interesting. Remember to make a boat!