Elvas is a town and a county in Portugal with around 23,000 inhabitants. The city is located on a plain dominating hill in the Portalegre district of the Alentejo region near the Spanish border, about 15 km west of Badajoz. Here are the largest surviving bulwark fortifications in the world. UNESCO included this and the entire historic center of the town of Elvas in the World Heritage List in 2012 under the title of border and garrison town of Elvas with its fortifications.