Hillsborough Castle in Lisburn and Castlereagh District

You're standing at Hillsborough Castle, in the village of Royal Hillsborough in County Down. Don't let the name fool you. This isn't a real castle at all. What you're looking at is a Georgian country house from the eighteenth century, built for the Hill family, the Marquesses of Downshire. They lived here until 1922, when the seventh Marquess sold the house and its grounds to the British government.