Alloa Tower. This is a 1300 Medieval Tower, the residence of the Clan Erskine, The Earls of Mar. Now under the National Trust of Scotland. John Erskine, 2nd Earl of Mar was exiled in 1715 for his Jacobite activities. His younger brother James was notorious for kidnapping his own wife, Lady Grange, to prevent her from revealing his Jacobite sympathies. Google her--the story is fascinating.