The Sultan Ahmed Mosque is popularly known as the Blue Mosque for the blue tiles adorning the walls of its interior. It was built from 1609 to during the rule of Ahmed I. It is considered to be the last great mosque of the classical period.
Where: Istanbul, Turkey, spanning the Bosphorus Strait. 210 feet above sea level. Awe Factors: Completed in this suspension bridge, the only bridge in the world linking two continents (Europe and Asia),