Our good friend Alissa Walker reports on Good’s blog about a trip this past Saturday led by BLDG BLOG author Geoff Manaugh to California City, a giant unbuilt city in the Mojave Desert, about 2 hours from LA. The trip was part of Obscura Day, described by its founders, Atlas Obscura, as “a day of expeditions, back-room tours, and hidden treasures in your home town.  California City is about 80,000 acres of land that was purchased in 1958 by developer Nat Mendelsohn, who hoped to eventually make it the third largest city in California. Unfortunately that never happened. He only managed to corral about 10,000 people. The rest is just a desert carved with an empty grid of dirt streets. Walker points out that the streets, with names like Oldsmobile Drive, still show up on maps. More of the 70 strange places visited on Obscura Day included a visit to Berkeley’s spooky Bone Room, a tour of the Integatron sound chamber in Joshua Tree,  and a visit to Baltimore’s Museum of Dentistry.