Hemyock Castle, located in Devon, is a small, compact castle. Built by Sir William Asthorpe, during the reign of King Richard II, it was partly demolished during the English Civil War, leaving only ruins. However, many parts of the castle still remain, including some of the castle walls and moat. It is today privately owned, but is occasionally open to visitors.
I've got bit of a thing for castles, and so you'll probably be hearing a lot more about many other castles in the future . . .