Uffington Castle is one of a chain of Iron Age hill-forts sited along the ancient Ridgeway path. The fort was built in around 500BC to a single ditch, single rampart design. Originally, there were two entrances at east and west, and the earth ramparts were topped with a wooden palisade. This was replaced with a stone wall in around 300BC. Archaeologists believe the fort was only used seasonally or temporarily. Visitors to the fort can climb up to a trig point which marks the highest point in Oxfordshire (858 feet).