Epping Forest contains two Iron Age earthworks. It is thought that both Loughton Camp and Ambresbury Banks were built around 500 BC. Used as animal folds in times of attack from another tribe or as look out posts and boundary markers between the Trinovantes and the Catevellauni. In use until after the Roman invasions.
Loughton Camp is located deep in the forest and a good map is required to find it. Never properly excavated, but an Iron Age stone quern was found nearby.