At a sprawling home for sale near Flamingo Road, you can golf, barbecue, swim, relax in a hot tub, dance under a starry sky and make breakfast while gazing at the mountains. All while 26 feet underground. The two-bedroom, three-bathroom house at 3970 Spencer St. might be the most peculiar in Las Vegas. It is buried 26 feet underground, underneath a typical suburban two-story house. A few miles east of the Strip, it was built in the 1970s to give people a place to safely retreat if the Soviets wiped out humanity with a nuclear missile strike.