7 of the Most Stunning Underground Structures in the World

Architectural Digest presents seven of the most stunning subterranean structures in the world. One Italian winemaker's headquarters occupies 540,000 square feet of Tuscan hillside. What used to be a nuclear bunker in Sweden is now a data center with waterfalls and greenhouses. The first-ever underground post office can be found in Slovenia. Guests take a 72-foot-long tunnel to get to a three-story home nestled in the Swiss Alps.