Sunsphere - 1982 World's Fair Tower - Knoxville, Tennesee (2005)
Excerpts From Wikipedia article on the Sunsphere: "The Sunsphere is an 81.07 m (266-foot) high hexagonal steel truss structure, topped with a 23m (74-foot) bronze glass-plated sphere. It is the most distinctive structure on the Knoxville, Tennessee skyline."
"Designed by the Knoxville architectural firm Community Tectonics, the Sunsphere was created as the theme structure for the 1982 World's Fair. It was noted for its unique design in several engineering publications. Today, most of the World's Fair site is a public park and a convention center, but the Sunsphere itself shows no sign of going away."
"An episode of The Simpsons features the Sunsphere, as Nelson accidentally topples the object (which, in The Simpsons' universe, has become a center for wig outlets) during the episode Bart on the Road which pays ironic tribute to the 1982 World's Fair. There is some speculation that the wig shop angle was inspired by J's Mega Mart, a nearby emporium notable for its selection of Korean snack food and a large stock of wigs."