Cold-War Bunkers Re-Enter the Spotlight Across the Nordics

Finland, Sweden and Norway are refurbishing and repurposing underground civil-defence shelters that were built during World War II and the Cold War. The renewed interest follows Russia’s war in Ukraine, which has heightened security concerns throughout northern Europe.

The Guardian

Finland maintains roughly 50,500 civil-defence shelters capable of housing about 4.8 million people—almost the entire Finnish population of 5.7 million. Approximately 85 percent of these shelters are private, reinforced-concrete spaces located within individual buildings. Helsinki alone can accommodate its ? 700,000 residents, with one public bunker designed for 6,000 people and fifteen similar large shelters.

The Guardian

Sweden reinstated conscription in 2017 after a decade-long suspension, reflecting a broader shift toward preparedness.

The Guardian

Norway’s shelter network numbers about 18,600 sites, but construction of new shelters ceased after 1998. Oslo’s largest bunker, built for 1,100 people, has not been renovated since 1992.

The Guardian

In Helsinki, former war shelters now host a 300-metre karting track, an axe-throwing club, gyms, cafés and even a swimming pool with an Olympic-size basin, water slides and a sauna. Ventilation, filtration and emergency facilities are kept operational, and private companies may use the spaces during peacetime provided they can vacate within 72 hours of an alert.

The Guardian

Stockholm’s underground landscape includes a former bunker that now houses the datacentre of Swedish telecom firm Bahnhof, where rows of servers sit beside generators and a wall of vegetation.

The Guardian

In Bodø, Norway, a German-occupation bunker from the Atlantic Wall was restored in 2014 and operates as a museum, preserving its original air-filtration system, communications gear and an Enigma machine. The country has also adopted a “total defence” approach this year, aiming to ready all sectors of society for a major crisis.

The Guardian

Jukka Lehtiranta, head of Helsinki’s Civil Defence Association, notes that the debate over the relevance of these shelters ended with Russia’s actions in Ukraine, and he continues to train volunteers for potential wartime emergencies.

The Guardian

• “It was a debate before, but thanks to Putin, it no longer is,” — Jukka Lehtiranta, the head of Helsinki’s Civil Defence Association

The Guardian

The conflict in Ukraine has transformed these once-considered relics into assets viewed as essential infrastructure. While everyday activities now coexist with hidden defence capabilities, the underlying systems—steel doors, decontamination chambers and filtration units—remain ready for rapid activation should a major crisis arise.

The Guardian