Underground atomic shelter transformed into an internet provider's HQ

Set thirty meters (100 feet) underground, deep within the bedrock and in what was once used as a Swedish atomic bomb shelter, lies this high security internet center. What sounds like the perfect hideout for a CIA facility or a film set for the next Jason Bourne film, is actually the HQ for the Swedish internet server provider, Bahnhof. Named "Pionen, White Mountain," the internet service facility is centrally located in Stockholm, directly below the Sofia Church, where the cave-like formation houses server halls and offices.

Gizmag