An early render of the long-planned but now defunct Elementica project – Elementica “With the establishment of Bahnhof Bunker, the Elementica project is also being phased out,” the company said this week. The company’s Pionen data center is located in a nuclear-proof bunker under the Vita Bergen mountains on Södermalm in Stockholm that was built in the 1940s as a civil defence facility to protect government functions in the outbreak of war.