Swedish Navy Returns to Vast Underground HQ Amid Russia Fears
1st October 2019
The top secret naval base on Muskö, about 25 miles (40km) from Stockholm, resembles a cross between Tracy Island from Thunderbirds and the film set of You Only Live Twice, where James Bond grappled with arch villain Ernst Blofeld in his headquarters beneath a volcano.
Completed in 1969, it boasts cavernous underground docks that can shelter warships, with miles of tunnels, offices and a hospital.