Asia
Read MoreWhere east meets west, Istanbul is the capital of Turkey with a metropolitan area supporting more than 14 million people, the largest urban area in Europe, as well as the largest in the Middle East. Formerly named Constantinople and once the capital of the Roman Empire, the city was instrumental in the advancement of Christianity.
Tianjin s a metropolis in northern China and one of the five national central cities of the People's Republic of China. Tianjin borders Hebei Province and Beijing Municipality, bounded to the east by the Bohai Gulf portion of the Yellow Sea. Part of the Bohai Economic Rim, it is the largest coastal city in northern China.