Silbury Hill is huge; it is likely to have involved roughly 4 million man-hours of work and 500,000 tonnes of material.
The largest man-made mound in Europe, mysterious Silbury Hill compares in height and volume to the roughly contemporary Egyptian pyramids. Probably completed in around 2400 BC, it apparently contains no burial. Though clearly important in itself, its purpose and significance remain unknown. There is no access to the hill itself.
It is part of the Avebury World Heritage Site.
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Learn about the project to conserve and restore Silbury Hill
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