Robert V. on Instagram: "Old Keiss Castle is a ruined 17th-century Z-plan tower house in Caithness, Scotland, built by George, 5th Earl of Caithness, possibly on the site of an older fort called Raddar. The castle was likely constructed with seaward defense in mind, as there's no evidence of landward fortification. It was abandoned by the early 1700s, and a new mansion, Keiss House, was built inland in 1755 to replace it. The ruins, now inaccessible due to decay, are visible from a distance and