The Walls of Ávila in central Spain, completed between the 11th and 14th centuries, are the city of Ávila's principal historic feature. These fortifications are the most complete in all of Spain.
Wikipedia https://en.wikipedia.org/wiki/Walls_of_Ávila
Address 1 Calle de Jimena Blázquez, Ávila 05001, Spain
Coordinates 40°39'24.479" N -4°42'6.696" E