One of the most beautifully situated of all Scottish castles, Eilean Donan Castle consists of a 13th-century wall surrounding a courtyard. In one corner of the courtyard stands a strong 14th-century tower of three storeys and a gabled garret. Adjoining ranges of outbuildings and fortifications were added in later centuries. The main tower has a flush parapet, with open rounds and corbelled machiocolations. - www.eileandonancastle.com