Hi Nat

>Will it go right underneath the stones, surely it can't as it could damage them?

No... I think the tunnel roughly follows the route of the existing A303, or thereabouts.

>I really don't know. I've enjoyed driving past Stonehenge and looking at it from the car, but >would also love to walk around it without having the buzz of the vehicles in the background....

Obviously, a bored tunnel is preferable to a cut n' cover, as it doesn't destroy the archaeology... and it is good that Stonehenge won't be hedged in by roads anymore. It no bad thing that the awful facilities will be wiped away too. My concern is that it won't be possible to get close up to Stonehenge for free anymore. You'll have to pay for a half decent view.

>Will it become too commercial...

I think that already happened a long time ago!