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Burg WartenbergMuttenz, Basel-Land (CH)GPS coordinates: N 47°31.291, E 007°39.485, 450m above sea level First mentioned in 1027 and inhabited until 1470. Initially owned by the king of Burgundy and later given to the nobels of Frohburg. During the Second World War fortified and used to conceal bunkers of the Swiss Army.
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