Block 3 or 4.

An amazing trip with SFHF. This site contains of 4 blocks of power generators built during the cold war and with only the chimneys above ground. With a amazing 1.5 M m3 carved out of the mountain this is as big as the Muskö naval base and as impressive in size and complexity. What can you say with 600 rooms and two internal water plants for the fresh water to the city of Stenungsund.