Not only do they offer the chance to climb spiraling stairways to the tops of the battlements, castles offer secretive passageways, unusual decoration, breathtakingly spectacular views, and the chance to relive the past. While some castles are freely accessible, many are open to the public through the efforts of a castle trust or preservation agency. Expect to spend at least one or two hours. In most cases, you will be allowed to roam freely, so be sure to pick up a guidebook with a detailed map of the site - they are great aids in clarifying the confusion you may feel and are also excellent keepsakes. Some castles offer guided tours, particularly those that are privately owned or lived-in, or have a wealth of treasures on display.
Some castles offer audio tours.
Welsh Historic Monuments, and Historic Scotland offer reciprocal programs of membership discounts at each other's sites. The National Trust also offers membership discounts, but maintains fewer castles than the others listed above. While saving yourself some money, you will also be making a great contribution to the preservation of these timeless, special places. Both English Heritage and the National Trust also have branches in the U.S. for individuals interested in receiving their literature and membership discounts and it is easy to join while in Britain.