Bahnhof's Office Bunker

Bahnhof’s secure, subterranean quarters
A soundproof conference room floats over caverns that previously housed emergency vehicles Photograph by Lars Tunbjork for Bloomberg Businessweek

When the Swedish broadband company Bahnhof leased a former World War II bunker in Stockholm five years ago, Chairman Jon Karlung saw an opportunity to reimagine the server farm. “The cliché is some fat guy with a pizza and his Coke in some place in the suburbs,” he says. Bahnhof’s facility is part space-age greenhouse and part Bond-villain lair, complete with smoke machines submerged in waterfalls and German diesel submarine engines repurposed as backup power generators.

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