Once the domain of conspiracy theorists and off-grid survivalists, bunkers have gone glam. Today’s ultra-secure sanctuaries are being built not just beneath remote ranches or desert compounds, but under some of the world’s most elite estates. And these hideaways are no longer concrete boxes filled with canned food—they’re luxury retreats stocked with five-star amenities. “Clients are thinking more critically about safety and long-term preparedness,” says Chad Carroll of The Chad Carroll Group at Compass. “This isn’t limited to stereotypical ‘doomsday preppers’—we’re talking about business executives, celebrities, and global investors who want peace of mind in any situation.” Driving this new trend, brokers and builders agree, is a potent mix of global anxiety and cultural influence. “World events have shifted from political theater to geopolitical crisis,” says Naomi Corbi of SAFE (Strategically Armored & Fortified Environments), a firm specializing in ultra-secure residential design. “And for those with deep insight and access to elite-level..