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.
The Willis Tower gets more than $25 million annually, and Riggs said naming rights could boost that when they expire. The agreement was between Blackstone Real Estate Partners VII and 233 South Wacker Drive LLC. The owners paid $841 million for the property in 2004. The building was the worldâs tallest from when it opened in 1973 until 1998. On a square-foot basis, the price for the Willis Tower was about $340, a fraction of what trophy towers fetch in major cities, MarketWatch said.