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2 Barnes West Drive , St Louis , Missouri

One of the best spiral tube slides around can be found at Millenium Park. Kids climb up a set of steps, crawl through a gray tube, then up through an orange one to the top platform. The slide is blue, which makes it pretty dark inside. It’s thrilling without being too scary—although, as Powell found out, the tubes on the way up are narrow enough to prevent all but the thinnest parents from accompanying a nervous youngster on the ride. Millenium Park also has an excellent teeter-totter, with thick shocks for softer landings.