Grenzau Castle is a ruined spur castle at 250 m above sea level near Höhr-Grenzhausen in the county of Westerwaldkreis in the state of Rhineland-Palatinate. It is the only castle in Germany with a triangular bergfried.
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Address 25 Burgstraße, 56203, Germany
Coordinates 50°27'0.935" N 7°39'19.307" E
