The Aggenstein is a mountain, 1,986 metres high (according to German survey: 1,985.4 m) in the Allgäu Alps on the border Bavaria, Germany and Tyrol, Austria. It is located in the Bavarian part of the Tannheim Mountains, a few kilometres south of Pfronten (Ostallgäu).
The prominence of the Aggenstein is at least 266 metres, its isolation is 1.8 kilometres, the Brentenjoch being the reference peak
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