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.
Sometimes also referred as Freedom Tower, One World Trade Center is the tallest building in the Western World and Fourth in overall list. It is situated in Lower Manhattan, New York. This 104-story structure also has strong connection with Twin Towers, which were destroyed during 9/11 attacks.