Immediately to the north of Woodhenge and spanning the A345 road is the largest henge monument in Britain – a massive banked and ditched enclosure over 400m across and nearly 1.5km in circumference.

Long recognised on old maps as an ancient British Village, Durrington Walls’ true importance only became apparent in the late 1960s when the road through it was realigned on a straighter path. You can see the line of the old, smaller, road in the aerial photo running to the left of the new road.

A massive rescue archaeological dig carried out in advance of the roadworks, making use of large earthmoving equipment for the first time (rather than only spades, trowels and brushes), revealed the existence of two timber circles within, as well as evidence for a settlement dating back to the late Neolithic around 2,500BC.

The scale of the ditch and bank is enormous –…