Family Day Out at Bramber Castle. The remains of this Norman castle are perched on a high natural knoll overlooking the River Adur, defending a gap in the South Downs. Built soon after the Norman Conquest to help protect William I’s newly won territories, the castle was the Sussex seat of the de Braose family. The one surviving wall of the tower, standing 14 metres high, provides a glimpse of how imposing the castle once was. Climb to the top of the motte for stunning views of the surrounding countryside. English Heritage Property.