Skyline, also known as the outline or panorama of a city, is an integral structure composed of high-rise buildings in a city or a local landscape composed of many skyscrapers. The skyline is also regarded as the artificial skyline of the urban structure.

The skyline as like as two peas in the world, is unique to every city. There are no two skylines in the world today. In cities, the skyline unfolds a vast skyline (mostly panoramic), so large cities are called "urban landscapes". In many metropolises, skyscrapers play an important role in their skylines. The skyline, including the harbour, is the most perfect.

Source: @sara_ringo