Vegas is now home to the 'world's biggest' weed store. Of course it is Come for the giant neon lotus flowers, stay for the weed. That's the pitch from Planet 13, a Las Vegas marijuana dispensary that bills itself as the world's largest. Housed in a 40,000-square-foot (3,700-square-meter) building—with retail space, back offices and room for weed cultivation—the store opened earlier this month just off the Strip in the shadow of the Palazzo, Treasure Island and the Wynn. (Ad Age)