skyline is the horizon created by a city's overall structure.
skyline is the horizon created by a city's overall structure, or by human intervention in a non-urban setting or in nature. City skylines serve as a kind of fingerprint as no two skylines are alike. For this reason, news and sports programs, television shows, and movies often display the skyline of a city to set a location. The term The Sky Line of New York City was first introduced in 1896, when it was the title of a color lithograph by Charles Graham for the color supplement of the New York Journal.[1]
Paul D. Spreiregen, FAIA, has called a skyline "a physical representation [of a city's] facts of life ... a potential work of art ... its collective vista