Category: Nature
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Mainz (DE)
Fortress system: 2000 years of fortress history - from Roman fort to Prussian imperial fortress
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La Línea de la Concepción (ES)
Lines of defence: Defence bulwark against Gibraltar; forts and bunkers from 300 years of fortification history
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Königstein, Saxony (DE)
Fortress: One of the most beautiful and powerful mountain fortresses in Europe
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Grauerort (DE)
Fortress: The artillery fort on the Elbe cycle path, Prussian fortress architecture of the 19th century
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Gizycko (PL)
Fortress system: Prussian fortress architecture in the heart of the Masurian Lake District
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Dömitz (DE)
Citadel and fortified ideal city: the only completely preserved Renaissance pentagonal citadel in northern Germany
