The Roman wall in the old town of Le Mans is one of the best of its type still extant in France. The 1300m long construction is laid out with 12 towers wraps around the immaculately preserved and restored Plantagenet Old City. There are only two longer ancient Roman walls left, in Rome and Istanbul (Constantinopole). These walls are highlighted every summer (July and August) evening in a light show that tells the history of the town.
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.