Pictured above is the CenturyLink Tower. At 11 stories and 174 feet in height, it is the tallest building in South Dakota. At least it is now. The Zip Feed Mill in Sioux Falls had a 202-foot grain elevator that was the tallest building in South Dakota from the time it was built in 1956 until it was scheduled for demolition on December 3, 2005. At that time, it became ...the second tallest building in South Dakota.
They don't build 'em like that anymore. Instead of coming apart under the stress of falling, the tower remained solid and just slid down into its basement, to much amusement from the crowd that had gathered to watch the demolition. However, it was quite tilted, so it was too dangerous to go in and rig it with explosives again. They ended up using a crane and a wrecking ball to take the tower down. You can read a history of the building here. -via a comment at reddit
(Image credit: TCN7JM)