Rockingham Castle is a remarkable fortress built by William the Conqueror nearly 1000 years ago and continuously occupied by the Watson family for 450 years—a rarity among long-inhabited English homes. Situated near Market Harborough, Leicestershire, the castle offers 15-mile views across the surrounding landscape and features well-maintained grounds hosting events, festivals, and theatrical performances. Visitors can enjoy guided castle tours, participate in family activities like the Fairy Day adventure, attend artisan markets, or arrange private events and weddings. The Walker's House Tea Room provides on-site dining, and TripAdvisor reviews consistently praise the friendly staff, beautiful grounds, and the approachable nature of the owning family.