Markree Castle in County Sligo, Ireland has been restored as a country house hotel known for its peace and relaxation. It dates back to the 12th century and was visited by King George IV in 1821. The cliffs of Moher in County Clare are one of Ireland's most famous tourist attractions, rising over 700 feet along the coast. Kilkenny Castle in County Kilkenny was built in the 12th century to control a river crossing and junction. It had large corner towers and defensive ditches.