and a large concrete bunker is located in proximity of the fort. Södra Åberget The only fort not to feature four distinct sides, Södra Åberget Fort () instead features the triangular design that was originally planned for all the forts, and the southwestern side is formed by the mountain scarp rather than a caponier ditch. The fort—planned and constructed on Södra Åberget Mountain south of Boden between 1902 and 1908—was together with Rödberget Fort part of the southern fort group. Södra Åberget Fort had the standard armament in the form of 12 cm kanon m/99, 8.4 cm kanon m/94-04 and 57 mm kaponjärkanon m/07. The 8.4 cm artillery was modernised between 1950 and 1952. Just like the neighbour Rödberget Fort on the other side of Lule River, Södra Åberget Fort has four bunkers, two observation posts and two searchlight sites in its surroundings. Rödberget Perhaps the best known of the five forts, Rödberget Fort (), situated on Rödberget Mountain southwest of Boden, was the last in line for construction, which started in 1903. The fort was finished in 1908 and originally featured four 15 cm fästningshaubits m/06 which in 1976 were replaced by four 12 cm kanon m/24 taken from scrapped Swedish Navy destroyers. At the same time, another two 12 cm cannon were fitted on a newly constructed small satellite fortification to the north of the fort. Rödberget Fort was part of the southern fort group together with Södra Åberget Fort on the other side of Lule River. These two forts—unlike the other forts—do not have a caponier ditch on all sides, as the western side of Rödberget Fort is protected by the natural scarp of the mountain. The surroundings feature four large bunkers, two observation posts and two searchlight sites. Today, Rödberget Fort is the only larger fortification of Boden Fortress that is open to the public. Commandants During the first years in existence, the position was simply titled Commandant in Boden (), but from 1928 on, the officer in charge was Commandant in Boden Fortress (), and later on had additional commands connected to the position: In media Boden Fortress is mentioned in Tage Danielsson's Sagan om Karl-Bertil Jonssons julafton; the story was made into a short film in 1975 and has been shown on Sveriges Television every Christmas Eve since that year. Karl-Bertil Jonsson, the young boy of the story, works extra at the post office