A fine specimen in a long line of great American roadside attractions, the Tree Circus is a curious orchard that included a birdcage, ladder, spirals, a telephone booth, and a staircase, all fashioned from the pliable branches of birch, ash, elms, and weeping willows. Started in the 1950s in California, the Tree Circus is a neat botanical version in a long history of wacky Californian attractions, including tar pits, dinosaur parks, and the mystery spot.