The track, that eventually becomes Avebury High Street, begins to the east of the Circle on the Ridgeway; further down the track it becomes Green Street, and after the Red Lion Pub it becomes Avebury High Street. Finally, at the bottom of the High Street, the track takes a right turn and then a left to become the footpath that crosses the Winterbourne, leading uphill again to Avebury Trusloe. The stream, rising somewhere between the Ridgeway and Green Street, follows a parallel course to the track, flowing down the side of Green Street and the High Street but then, unlike the track, flowing straight on at the bottom of the High Street into the Winterbourne.

The Avebury Circle is situated centrally over the Green Stream's course; the stream itself disappearing at the top of Green Street before remerging just east of the post office. There's a well in the Red Lion pub (86' deep) and several other wells close by. In other words the Avebury circle is situated over a source of fresh water. Unless the Avebury Circle was used for purely 'religious' purposes it seems probable that a prehistoric settlement of considerable size and importance exists somewhere within it (or alternatively somewhere very close by).