Château de La Brigue was built by the Ventimiglia family between 1376-1379. In 1543 small bastions were added to the main building. An earthquake partially destroyed the castle in 1546, but it was used to resist a Genoese attack in 1625. The castle was set on fire by the French troops during the French revolution in 1794 and since it has been lying in ruins.
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.