Ethie Castle, believed to be Scotland's second oldest permanently inhabited castle, stands in Inverkeilor near Arbroath in Angus with roots extending to 1300 when the Abbot and Monks of Arbroath Abbey built the original sandstone keep. Rebuilt around a courtyard circa 1530 in honor of King James V's visit, the castle has passed through notable hands including Cardinal David Beaton and the Carnegie family from 1665 to 1928, who maintained it until the 20th century. The castle inspired Sir Walter Scott's novel 'The Antiquary,' appearing as 'Knockwinnoch,' and now operates as a bed and breakfast under the ownership of the Earl of Wigtoun, offering guests the opportunity to experience this 14th-century structure surrounded by historic gardens and grounds.