The Castle can be visited
Castle of Mey

The Castle of Mey, formerly known as Barrogill Castle, is a castle in the northeast of Scotland.
History+
The castle's origins date back to the 16th century when it was built by George Sinclair, the 4th Earl of Caithness. It served as a residence for the Earls of Caithness until it passed out of family ownership in the late 19th century and partially fell into disrepair. In 1952, Queen Elizabeth, the widow of King George VI, acquired the estate. She was of Scottish descent. Under her patronage, the castle underwent extensive renovation and modernization, including the installation of electricity and water. From 1955 until her death, she used it as a private holiday residence in August and October.
Source: Wikipedia · Licence: CC BY-SA 4.0
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 58.6472, -3.2248