Uffington Castle is an early Iron Age univallate hillfort 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. It is very close to the Uffington White Horse on White Horse Hill.

The Uffington White Horse is a prehistoric hill figure, 110 m (360 ft) long, formed from deep trenches filled with crushed white chalk. The figure is situated on the upper slopes of Whitehorse Hill in the English civil parish of Uffington in Oxfordshire, some 16 km (10 mi) east of Swindon, 8 km (5.0 mi) south of the town of Faringdon and a similar distance west of the town of Wantage; or 2.5 km (1.6 mi) south of Uffington. The hill forms a part of the scarp of the Berkshire Downs and overlooks the Vale of White Horse to the north. The best views of the figure are obtained from the air, or from directly across the Vale, particularly around the villages of Great Coxwell, Longcot, and Fernham.