a banked and ditched enclosure, there is a central platform enclosed by a deep ditch, the ditch material is then thrown onto the outer edge to form a bank around the whole
a circular area surrounded by a ditch with a causeway entrance, often with a stone circle in the center
a circular earthwork consisting of a deep quarry ditch with a concentric outer bank
a circular or sub-circular prehistoric enclosure defined by a raised circular bank, and a circular ditch
a circular or sub-circular prehistoric enclosure defined by a raised circular bank, and a circularditch usually running inside the bank
a ritual enclosure defined by a bank and ditch
a roughly circular prehistoric earthwork consisting of a ditch and bank with a level plateau in the centre
A late Neolithic enclosure comprising of a circular ditch and external bank with one or more entrances formed by a break in the bank/ditch.
Almost unique Late Neolithic British earth enclosure of bank and ditch (usually internal). Class I has single entrance; Class II has two or more entrances. Apparently used for ceremonial purposes
hanging. Stonehenge means, "hanging stones"
Stone circle with surrounding earthworks.
a circular area enclosed by a bank or ditch, used for religious ceremonies in prehistoric times
A henge is a circular or almost-circular area with a bank on the outside and a ditch, usually on the inside. They have at least one entrance. Henges have timber or stone circles inside.
stoneless ceremonial circle often circled by trees, may have been a stone circle.
A henge is a prehistoric architectural structure which consists of nearly circular or oval-shaped flat area over 20 metres (65 feet) in diameter that is enclosed and delimited by a boundary earthwork that usually comprises a ditch with an external bank. The earthwork permits access to the interior by one, two, or four entrances. Internal components may include portal settings, timber circles, post rings, stone circles, four-stone settings, monoliths, standing posts, pits, coves, post alignments, stone alignments, burials, central mounds, and stakeholes (http://www.eng-h.gov.uk/mpp/mcd/sub/henges1.htm English Heritage definition).