Skipness Castle was built in the early 13th century by the Clan MacSween with later fortifications and other additions made to the castle through the 13th, 14th and 16th centuries. The castle was garrisoned with royal troops in 1494 during King James IV of Scotland's suppression of the Isles. Archibald Campbell, 2nd Earl of Argyll granted Skipness to his younger son Archibald Campbell in 1511.
During the Wars of the Three Kingdoms in 1646, the castle was besieged by forces under the command of Alasdair Mac Colla. During the siege, Alasdair's brother, Gilleasbuig Mac Colla, was killed in August 1646. The castle was abandoned in the 17th century. The Green Lady of Skipness Castle is said to haunt the location.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.