Carrawburgh is a settlement in Northumberland. In Roman times, it was the site of a 3½ acre (1.5 ha) auxiliary fort on Hadrian's Wall called Brocolitia, Procolita, or Brocolita This name is probably based on the Celtic name for the place, and one possible translation put forward is 'badger holes'. The fort there was the Wall's northernmost point, and just over a mile west of the nearest milecastle, Milecastle 30. It either used the Wall (narrow gauge on a broad base at this point) itself as its northern rampart, or was built parallel to it but detached. It certainly postdates both the Wall and the vallum (which it is built across).