Istanbul is very important place not only in Turkey but the world. Istanbul is some time the biggest and the most crowded city in Europe. There are millions of tourists visit here every year. Istanbul has a very ancient history and rich culture. Istanbul lived in Byzantyne, Ottoman and Turkish Republic periods. A lot of kings, sultans and famous people lived in this wonderful city. The Camlica hill is the higgest hill in Istanbul and it is one of the facisinating spots to visit. Bosphorus bridge is another beautiful site. The museum of Ayasofya is very important building for Islam and Christian people. Visiting this places will be the real treat for travellers.