Şile (Greek: Χηλή) is a small holiday town on the Black Sea, 70 km from the city of Istanbul, Turkey. In 2000 the population was 32,923, of which 10,571 lived in the town of Şile, and the remainder lived in surrounding villages, including Ağva (Yeşilçay). However, between June and September, the population rapidly increases because of the many residents of Istanbul who have summer houses in Şile.
Source : http://en.wikipedia.org/wiki/%C5%9Eile
Istanbul (historically Byzantium and later Constantinople; see the other names of Istanbul) is the largest city of Turkey and the third largest city in the world. The city covers 27 districts of the Istanbul province.It is located on the Bosphorus Strait and encompasses the natural harbor known as the Golden Horn, in the northwest of the country. It extends both on the European (Thrace) and on the Asian (Anatolia) side of the Bosphorus, and is thereby the only metropolis in the world which is situated on two continents. In its long history, Istanbul served as the capital city of the Roman Empire (330–395), the East Roman (Byzantine) Empire (395–1204 and 1261–1453), the Latin Empire (1204–1261), and the Ottoman Empire (1453–1922). The city was chosen as joint European Capital of Culture for 2010. The historic areas of Istanbul were added to the UNESCO World Heritage List in 1985.