Members of CSSC benefit from a great range of discounted and free days out and shopping vouchers.
The substantial remains of a strong and important motte-and-bailey castle dating from the 11th to 15th centuries, with surrounding walls, ditches and earthworks.
Richard Earl of Cornwall added a 13th-century palace complex.
Open daily, summer 10am-6pm, winter 10am-4pm. Closed Christmas Day and New Years Day.