Dun (fortification)
Scottish and Irish Gaelic word for a small fortress, or fortified dwelling place.
Roundwood
Roundwood is a wooded peninsula on the River Fal in Cornwall, where there is evidence of occupation and settlement since at least the Iron Age.
Mellor hill fort
Prehistoric site dating from the British Iron Age, situated on a hill in the village of Mellor, Greater Manchester, on the western edge of the Peak District.
Slack Roman Fort
Castellum (fort) in the Roman province of Britannia, which may have been the Cambodunum mentioned as a station on the road between Deva Victrix (Chester) and Eboracum (York).