and famous town can drastically alter the image of the city. In cities such as London in the United Kingdom or San Francisco in the United States, there is a legal requirement called protected view, which limits the height of new buildings within or adjacent to the sightline between the two places involved. This rule also makes it harder to find suitable sites for new tall buildings. See also List of architects of supertall buildings List of cities with most skyscrapers Plyscraper Seascraper References Further reading External links How Stuff Works explanation of Skyscrapers Skyscrapers