The Garrison Border Towns of Elvas are a series of fortified settlements located in Portugal, near the border with Spain. These towns were strategically built to protect the region from invasions and to control trade routes. The architecture features impressive walls and bastions, showcasing military engineering from the 16th century. Elvas is particularly notable for its well-preserved fortifications, which include the Amoreira Aqueduct and the Fort of Graça. These structures reflect the historical significance of the area and its role in various military conflicts. In 2012, the Garrison Border Towns of Elvas were designated a UNESCO World Heritage Site.