Vertigo, Hong Kong

Hong Kong has the world's greatest number of skyscrapers, at 6,439. The high density and tall skyline of Hong Kong's urban area is due to a lack of available sprawl space, with the average distance from the harbourfront to the steep hills of Hong Kong Island at 1.3 km. This lack of space causing demand for dense, high-rise offices and housing, has resulted in 38 of the world's 100 tallest residential buildings being in Hong Kong and more people living or working above the 14th floor than anywhere else on Earth, making it the world's most vertical city.