A view of West Kennet Avenue, a prehistoric site south of Avebury, England.  It was originally an avenue of two parallel lines of stones 82 feet wide and 1.5 miles in length, which ran between the Neolithic sites of Avebury and The Sanctuary.  There are currently 27 upright stones and 37 concrete pillars marking original stone locations.

Excavations directed by Alexander Keiller and Stuart Piggott in 1934 and 1935 indicated that around 100 pairs of standing stones had lined the avenue, dated to around 2200 BC from finds of Beaker burials beneath some of them.  The missing stones had been pushed over and buried, or broken up for building materials, between the 13th and 17th centuries.

From: https://en.wikipedia.org/wiki/Kennet_Avenue