Mont Saint-Michel never fell during the Hundred Years’ War due to its impregnable defenses and strategic location, which made it nearly impossible for invaders to besiege by land or by naval blockade.
📸: Marcel Siebert
2. Hohensalzburg Fortress, Austria 🇦🇹
The “Salt Fortress” is one of the largest fully preserved castles in Central Europe, spanning over 250 meters in length and 150 meters in width.