Femöre Battery, Oxelösund, Sweden
Femöre battery (Femörefortet) is a facility previously operated by the Swedish Coastal Artillery arm of Swedish Armed Forces. Also known as "Battery OD", it is located only a short trip south-east of Oxelösund on the Swedish east coast, and is blasted into the rock on the Femöre peninsula. The facility totals approx. 3,300 square meters (36,000 sq ft) in size, and is connected via an over 450 meters (1,480 ft) long tunnel, stretching across the length of the facility.
Wikipedia
