I know it's meant to be more than just about the views, but that is what strikes you when you arrive. The small fee to get in is well worth it - your ticket lasts a year if you are back in the area.
The site is fascinating, with a smooth walkway to take you round the site. Plenty of benches and bins should you want a rest, and there are lots of information boards around to give you the history of the site.
A very peaceful and thought provoking walk.