Under no circumstances should a city pour a slab of concrete to build temporary ramps as the funds would be much better spent building a permanent concrete skatepark to begin with. Most concrete skateparks will cost between 20 and 25 dollars (USD) per square foot to build.
From the ground to the roof it is 442 meters (1,450 feet) tall. It was designed by Fazlur Khan and Bruce Graham. Willis Tower is the second-tallest building in the United States. It is the eighth-tallest freestanding structure in the world. It is one of the most popular tourist destinations in Chicago.
New York's Nordstrom Tower set to become tallest residential structure in the world at 1,775ft (making it just a foot shorter than One World Trade Center) 1  The Nordstrom Tower is under construction on West 57th Street in Manhattan and will be completed in 2018. It will measure 1,775 feet at its spire - which is 300 feet taller than anything else in Midtown but one foot shorter than One World Trade Center.