I was really impressed by Stonehenge but i can understand why it leavse most people underwhealmed. The stones are huge once you see them up close and the scale of the site is impressive aswell if you look at the whole area not just the bit that most tourists see.

The other sites are well worth a visit. Woodhenge!! is not impresive but can make for nice anecdotes especially if coupled with strawhenge and a big bad wolf!! But Avebury just down the road is more impressive you can acctually go up and touch the stones.

If you are in the area it is definatly worth a visit to Sailsbury which has an impressive Cathedral, as does nearby Wichester.