A network of underground military bunkers located in the historic naval city of Karlskrona, Sweden. The city, founded in 1680 as Sweden's primary naval base, contains over 5,000 square meters of secret subterranean fortifications. These bunkers were part of Sweden's extensive Cold War-era defense infrastructure, designed to protect military personnel and equipment during potential conflicts.
The entrances to these bunkers are discreetly integrated into the urban landscape, with many hidden in plain sight throughout the city center.