This prehistoric monument on the Salisbury Plain is thought to be carved from stones of the Prescelly Mtns.
Surrounding the barrow 
are 30 upright stones many of which have decorative carvings that are similar to 
carvings... [DOC] [TLE] Ancient Observatories - Timeless Knowledge - Stanford Solar Center [PAR] Here is a collection of sites, prehistoric and otherwise, that include artifacts 
related to .... "These vertical sighting stones in the circle correspond to the zenith 
Sun .... the Plains Indians used the temple to observe sunrise on the winter and 
summer .... circle are believed to be from the Prescelly Mountains, located 
roughly 240... [DOC] [TLE] Stonehenge - Jeffery Winkler [PAR] Stonehenge is probably the most impressive megalithic monument.