Bunkers for billionaires.

The Swiss firm showed bunkers for billionaires, as in films about the end of the world. Designed to fit under mansions, the 1,000-square-meter structures appear to be optimized for everyday luxury living and ready for any ground-based threats. The high-tech bunkers descend 15 meters underground and have a gateway fully equipped as a decontamination chamber, an indoor garden, a fitness room, comfortable living and sleeping quarters, and even a private art gallery.