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These photos of a Cuban amusement park depict a collection of ingenious skeletal wireframe rides made from welded tube-steel. It looks a little unsafe, but that's half the fun at your average fun fair.
Link
Update: Arlo got some nice video of a Cuban fun-fair in action.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.