Haining Castle.

Also known as Almond Castle, it dates from the 14th century and comes with a serious health warning! Do not attempt to enter this building, it may very easily fall on top of you! Even from the safe distance in this photo, the precarious state of the ancient masonry an be seen. 
Sadly Scotland has many such wobbly old structures (not all quite as venerable as this one) which are desperately unsafe and now surrounded in heavy duty safety fencing.