Avebury Henge in Wiltshire. The fascinating image of the henge below is a recreation looking from the south made by Alan Sorrell in 1958.....It also helps to convey just what an amazing sight it must have been when all the stones were in place.
Holme Timber Circle (Seahenge), discovered on the beach at Holme, Norfolk in 1998. The circle of timber posts within the intertidal zone studied and was found to have been constructed in the spring/early summer of 2049 BC, during the Early Bronze Age. Because of the perceived threat of damage and erosion from the sea a rescue excavation was undertaken and the structure was entirely excavated/removed to a location inland, despite controversy.