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Today, along with Avebury, it forms the heart of a World Heritage Site, with a unique concentration of prehistoric monuments.
The earthwork Avenue was also built at this time, connecting Stonehenge with the river Avon.
One of the last prehistoric activities at Stonehenge was the digging around the stone settings of two rings of concentric pits, the so-called Y and Z holes, radiocarbon dated by antlers within them to between 18 BC.
There has been much debate about what stood in these holes: the consensus for many years has been that they held upright timber posts, but recently the idea has re-emerged that some of them may have held stones.
Within and around the Aubrey Holes, and also in the ditch, people buried cremations.