The Garrison Border Town of Elvas and its Fortifications, recognized by UNESCO in 2012, is a remarkable example of 17th to 19th-century military architecture. This site in Portugal showcases the world's largest bulwarked dry-ditch system, reflecting the town's strategic role in the country's defense. Within its walls, Elvas houses not only military buildings but also significant religious structures and the impressive Amoreira aqueduct, designed to sustain the town during sieges.