Avebury

51.4286°N, 1.8542°W.

Late Neolithic henge enclosing a 14-hectare circle of standing stones in Wiltshire, England, constructed approximately 2600–2400 BCE — making it contemporary with Stonehenge but significantly larger. The outer ring originally contained 98–100 stones; about 30 remain in situ, the largest weighing 100 tonnes. Two smaller inner circles, the Northern and Southern, lie within the henge; a 2.4-km avenue of paired standing stones (the West Kennet Avenue) connects Avebury to the Sanctuary on Overton Hill. The surrounding landscape includes Silbury Hill (the largest artificial mound in prehistoric Europe, 30 metres tall, ~2400 BCE) and the West Kennet Long Barrow chambered tomb. Most of the avenue stones were removed and broken up during medieval Christian iconoclasm and 18th-century farming.

The largest stone circle in Europe lost half its stones to medieval villagers smashing them for building rubble — and the village still sits inside it.