Odiham Castle is a ruined castle situated near Odiham in Hampshire, United Kingdom. It is one of only three fortresses built by King John during his reign. The site was possibly chosen by King John because he had visited the area in 1204 and it lay halfway between Windsor and Winchester. Odiham Castle lies on the banks of the Basingstoke Canal, but was built long before the canal existed.
The nearest station is Hook, just a 15 minute walk away.
See the official Odiham Castle website for visitor information.