Herstmonceux Castle is a Grade I-listed, 15th-century brick-built castle set within over 600 acres of woodland, wildflower meadows, and formal gardens in East Sussex. Built between 1441 and 1449 by Sir Roger Fiennes and his son Lord Dacre, it is one of the oldest and largest brick buildings in England, constructed using locally made bricks from Flanders builders. The estate operates as a unique visitor attraction blending history and nature, with open grounds throughout the year and guided castle tours available on-site. Woodland walks and meadows surrounding the moated castle provide picturesque exploration opportunities.