Barcaldine Castle is a 17th-century tower house castle built by Sir Duncan Campbell, of Glenorchy, between 1601 and 1609. The castle fell into disrepair in the later 19th century, when Barcaldine House became the principal residence of the family. It was restored between 1897-1911 and now operates as the Barcaldine Castle bed & breakfast hotel.References:
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.