Cissbury Ring 

Dated as an iron-age hill fort situated along the South Downs(in the south of England funnily enough), bordering on the outskirts of Worthing and by Findon Valley.
Listed as a site of Heritage.

Its a big hill thats great for such activities including: getting stoned/pissed, camping, all-nighters etc. all illegal of course. Although there is the un-written rule that you do have to clear your own mess up afterwards as common courtesy, otherwise you're just a rude common twat that deserves no respect. As like it or not, it does have great views and its just not nice to spoil it for others.

Cissbury Ring by Paperdoll-in-funky-socks June 23, 2004