Travel / Slab City, / The Last Free Place In The America / Squat Town USA / Obscure Slab City occupies 640 Acres and is located in California’s Sonoran Desert. The name refers to the concrete slabs that were once facilities used during WW 11 as a military training site. Ft. Dunlop was abandoned in the 1950’s. People now come here to live alturnative life styles on this unincorporated land, off the grid, rent - free and lawless.