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The World's 30 Most Impressive Fortresses

There's just something satisfying about completing an aboveground fort : r/dwarffortress

Gori Fortress (Georgian: გორის ციხე) is a 13th century castle, situated on a hill above the city of Gori (Georgian: გორი) …

Candia (Iraklion), a Venetian fortress in Greece

Fortress from Ottoman, Byzantine eras to become Istanbul's most glamorous cultural venue

Types and History of Castles - Star Forts

Belgrade Fortress - Wikipedia

Byzantine Fortress of Archaeopolis (Nokalakevi), Georgia (Illustration) - World History Encyclopedia

Kristiansten Fortress, Trondheim

The Gibralfaro: The Most Spectacular Views in Malaga