Wiltshire is jam packed with neolithic monuments but here are just two you may not have heard of?
Adam's Grave is a long barrow perched high overlooking the Vale of Pewsey. It measures 65 metres long by 28 metres wide and still reaches 6.5 metres high. Known as "Wodnesbeorge" (Woden's Barrow) in Saxon times it was the site of a battle in 592AD.
On the opposite hill sits the Neolithic causeway enclosure of Knap Hill. This is one of the first to be found and It has six or seven ditches that are broken by at least five causeways. No one knows the purpose of these monuments but we do know that they are among the first man made features in the landscape.
Adam's Grave - http://www.pastscape.org.uk/hob.aspx?hob_id=221145
Knap Hill - http://www.pastscape.org.uk/hob.aspx?hob_id=221139