Naisaare Naval Mine Factory Military equipment

Naisaare Island was home to one of the largest Soviet naval mine storage and assembly complexes in the Baltics during the Soviet era. It was built in 1950–1956 to quickly mine the western part of the Gulf of Finland if necessary, and the territory was a closed military zone for civilians. Naval mines were assembled, repaired, stored and transported there via the island's narrow-gauge railway to the port.