Gartartan Castle, Abandoned Scotland
Built c1597 much of the usual Z form structure remains, but the owners are using the castle for storage and sadly the place is becoming a dump. The lovely round tower contains the entrance doorway and staircase. The ground floor is vaulted. Above this vault, at one end, a modern house has been built, access to which is by wooden stair in the smaller turret. Weird place....but worth a look as it's not far off the beaten track.