Silbury Hill is the largest prehistoric man-made mound in Europe. It was built over 4,000 years ago in the Neolithic period. Back in 2008, we posted that The Guardian had announced that works on the Hill to stop it collapsing had been completed. The article below has been recovered for your interest after it was lost in a database crash 2 years ago. On 29 May 2000 a hole unexpectedly appeared on the top of Silbury Hill. A shaft had become open to a depth of 14 metres. Despite attempts to safeguard it, in December the top collapsed to leave a large crater, damaging important archaeological deposits.
Silbury is part of the Avebury World Heritage Site, the monument’s purpose and significance for prehistoric people remains unknown. The secret of Silbury Hill, the most enigmatic prehistoric monument in Europe, isn’t the monument but the monumental effort which went into building it, according to the archaeologist who has spent most of the last year slipping around on wet chalk deep in the heart of the hill.