West Kennet Long Barrow

The West Kennet Long Barrow, also known as South Long Barrow, is a chambered long barrow near the village of Avebury in the south-western English county of Wiltshire. Probably constructed in the thirty-seventh century BC, during Britain's Early Neolithic period, today it survives in a partially reconstructed state.

Archaeologists have established that the monument was built by pastoralist communities shortly after the introduction of agriculture to Britain from continental Europe. Although representing part of an architectural tradition of long barrow building that was widespread across Neolithic Europe, the West Kennet Long Barrow belongs to a localised regional variant of barrows in Western Britain, now known as the Cotswold-Severn Group. Of these, it is part of a cluster of around thirty centred on Avebury in the uplands of northern Wiltshire.

Source: Wikipedia