Fortresses of the Raia
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The Bulwarked Fortresses of the Raia, a UNESCO World Heritage Site, form a remarkable network of 17th- and 18th-century bastioned fortifications along the historic border between Portugal and Spain, exemplifying advanced military engineering of the period. These strategically designed structures, with star-shaped layouts, moats, and thick walls, protected key crossing points and bear witness to centuries of geopolitical tensions while showcasing shared Iberian defensive heritage.