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LocationCastle Angenstein in Duggingen (CH)GPS coordinates: N 47° 27.792', E 007° 36.279', 400m above sea level Mentioned in the 13th century to be owned by the duke of Pfirt. Strategic location at the entrance of the valley of the river Birs. Located over a railway tunnel. Part of fortifications and bunkers constructed during the second world war.
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