#4237 Odiham Castle The favourite of many, Odiham Castle is every inch the medieval ruin, and is one of the oldest. Known also as King John’s Castle, being one of just three founded by that C13 royal, it harboured secrets and prisoners through its colourful life. They included King David II of Scotland, held prisoner here for some for 11 years from the year 1346. Built from c1207 on, its site formed by realigning the Whitewater river, it once boasted an inner moat now reduced