St. Louis' City Museum.
10 slides. Some slow. Some medium. Some fast. There are more slides than these 10, but hey. The slide at 2:15 is a 10 story tall corkscrew. It's made from the chutes from an old shoe factory which were used to send the assembled soles down several flights to be attached to the shoe uppers. I think.
Anyway. The City Museum. Awesomeness!