Stonehenge, Avebury and Associated Sites

Stonehenge, Avebury and Associated Sites is a UNESCO World Heritage Site in Wiltshire, England.
Stonehenge and Avebury are groups of large stones called megaliths. Both sites are circles of stones which are placed in a pattern. In each, the placement of the stones and spaces between them may have astronomical meaning.
History.
The creation of Stonehenge and Avebury dates from the Bronze Age.
Avebury is to the north of Stonehenge. It is Europe's largest prehistoric stone circle. It has about 100 megaliths.
Small sites of prehistoric stones are nearby, including Silbury Hill, Windmill Hill, West Kennet Long Barrow, and Overton Hill.