Explore #3 of the ‘Almost Died Tour’ Next up we have a ruined castle which really captivated me from the moment I first saw a photo of it online… History McDermott’s castle stands on Castle Island in Lough Key, County Roscommon. The Mac Diarmada (McDermott) ruling dynasty first built a castle on the site in the 12th century, and repeatedly came under seige in the 13th century. The McDermotts lost the island in 1586, and the current folly castle was…