Cave castle
A cave castle (German: Höhlenburg) or grotto castle (German: Grottenburg) is a residential or refuge castle that has been built into a natural cave. It falls within the category of hill castles.
A cave castle (German: Höhlenburg) or grotto castle (German: Grottenburg) is a residential or refuge castle that has been built into a natural cave. It falls within the category of hill castles.
A cave castle (German: Höhlenburg) or grotto castle (German: Grottenburg) is a residential or refuge castle that has been built into a natural cave. It falls within the category of hill castles.
Source: Wikipedia "Cave castle" · CC BY-SA 4.0
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