Another off the beaten path option, this is the preserved bunker rooms of Churchill's time. Kept exactly as they left it, you will wind through the meeting rooms, offices, map rooms and sleeping rooms. there is a multi media section on Churchill which maps through his life. I could have spent hours there, although my husband and son were done in just over an hour.
You really shouldn't miss this opportunity to see this preserved piece of history of one of our iconic war times.