Bluehenge

Bluestonehenge or Bluehenge (also known as West Amesbury Henge) is a prehistoric henge and stone circle monument.Historic England. "West Amesbury Henge (1580342)". PastScape It was discovered by the Stonehenge Riverside Project about  southeast of Stonehenge in Wiltshire, England. 

 Original monument 
Originally, there may have been as many as 27 stones in a circle 33 feet (10 m) wide. The stone circle settings were surrounded by a henge, comprising an  ditch and outer bank which appears to date from approximately 2400 BC.

There are no pictures of Bluehenge, because the only parts of it that still exist are underground. The ditch and a series of stone settings still exist, but they are not visible above ground. 

 Excavation 
The site was excavated in August 2008 and again in August 2009. It is considered an important find by archaeologists.Newhenge, British Archaeology 110, January / February 2010, 

Excavation revealed two flint chisel arrowheads in a style commonly used between 3400-2500 BC. The stones were put up during that period. 

 Bluestones 
The name "Bluestonehenge" is from the small stone chips found in some of the stone settings. These bluestones are also found in Stonehenge and consist of a wide range of rock types originally from Pembrokeshire, West Wales, some  away.Derbyshire, David 2009. Bluehenge unearthed: prehistoric site that could be famous stone circle's little sister. London: Daily Mail.  Archaeologists think any bluestones in the circle may have been removed around 2500 BC and used at Stonehenge, which had a major rebuilding at about that time.Archaeologist at University finds 'Bluestonehenge' site. Sheffield University.  

 References 

Category:Henges
Category:Stone circles
Category:World Heritage Sites in the United Kingdom
Category:Archaeological sites in Wiltshire
Category:Neolithic
Category:Buildings and structures in Wiltshire
Category:3rd millennium BC buildings and structures