Dover Castle is a medieval castle in the town of the same name in the English county of Kent. It was founded in the 12th century and has been described as the "Key to England" due to its defensive significance throughout history. It is the largest castle in England.
7 Castles You Can Sleep In Stay overnight in a historic European castle that has been converted into a hotel. Ashford Castle Once owned by the Guinness family, Ashford Castle of County Mayo, Ireland, whose oldest parts date to 1228, was home base for director John Ford while he was filming The Quiet Man; ashford.ie.