Henges
The three henges are almost identical in size and composition, each having a diameter of approximately 240 metres and two large entrances situated directly opposite each other. The henges are located around 550 m apart on an approximate northwest-southeast alignment, although there is a curious 'dogleg' in the layout. Altogether, the monument extends for more than a mile.
Archaeological excavation of the central henge has taken place. It has been suggested that its banks were covered with locally mined gypsum. The resulting white sheen would have been striking and visible for miles around. A double alignment of pits, possibly evidence of a timber processional avenue, extends from the southern henge.
The 'dogleg' in the layout appears to cause the layout of the henges to mirror the three stars of Orion's Belt. The exact purpose of the henges is unclear though archaeological finds suggest that they served economic and social purposes as well as astronomical ones.
The Northern henge is currently overgrown with trees but is one of the best preserved henges in Britain. The Central and Southern henges are in poorer condition although the banks of the henges are still quite prominent, especially in the case of the Central henge. To gain a full appreciation of the scale of the monument it is best viewed from the air.
Read more about this topic: Thornborough Henges