Old Los Angeles Zoo

What look like Aztec ruins in a picnic-friendly park are actually the abandoned remnants of the city's original zoo. The site opened in 1912 with a modest 15 animals, though many of the (rather tight) enclosures, which housed everything from lions and bears to monkeys, date from the 1930s. The site was abandoned in 1966, when the current zoo opened its doors just to the north.