The City Museum in St. Louis, Missouri, isn’t really a museum. It’s actually a 600,000 square-foot playground housed in a former shoe factory, in the heart of one of America's largest cities. The museum is made almost entirely of recycled industrial debris – a labyrinth of underground cabins, numerous cubbyholes, simulated caves, suspended bridges, and a ten-story tall slide. There are two airplanes perched more than fifty feet up in the air, a 30-foot-high Ferris wheel, and an old school bus hoisted all the way to the top floor. Nearly everything you see there is interconnected with each other with ladders and tunnels, and can be climbed upon. The official website calls the Museum  “an eclectic mixture of children’s playground, funhouse, surrealistic pavilion, and architectural marvel made out of unique, found objects.”

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