World's Strangest Bridges
Jamie Pham / Alamy
Moon Bridge: Japanese Tea Garden, San Francisco
While its arch looks purely ornamental, this style of traditional Japanese bridge is also practical. It allows canal barges to pass underneath and (able-bodied) pedestrians to pass overhead, scaling the sides like a ladder. This particular Moon Bridge was constructed in Japan by Shinshichi Nakatani for the 1894 Midwinter Fair in San Francisco.