Uffington Castle is an early Iron Age (with underlying Bronze Age) hill fort in Oxfordshire, England. It covers about 32,000 square metres and is surrounded by two earth banks separated by a ditch with an entrance in the western end. A second entrance in the eastern end was apparently blocked up a few centuries after it was built. The original defensive ditch was V-shaped with a small box rampart in front and a larger one behind it. Timber posts stood on the ramparts. Later the ditch was deepened and the extra material dumped on top of the ramparts to increase their size. A parapet wall of sarsen stones lined the top of the innermost rampart.