If you’re interested in the archaeology of the county of Wiltshire, you can now access the Wiltshire Sites and Monuments Record (SMR) online, complete with a map interface.
The SMR is the archaeological record of a county and, as Tom points out, Wiltshire is the county with Stonehenge in it.
Adding the map interface is one of these things which sounds simple, but which hardly anybody offers. I can find my house on a map, but I couldn’t tell you the OS grid reference, nor parse grid references from locations in the record to work out where they lie in relation to me. It doesn’t add any new information to the SMR but changing the interface makes it a lot more accessible. If the SMR databases over all UK counties were opened up then this kind of approach would be a massive help for anyone who’s interested in their local archaeology rather than their local administrative district.
If you don’t know the names of local villages or parishes, or OS references, but are interested in Stonehenge and its surroundings, then Wiltshire Council’s action is a important as any major book the subject.
Unfortunately the map isn’t appearing for me. I don’t know if that’s my browser or the work on the council’s servers causing the problem. Hopefully you’ll have better luck. As you can see on Tom’s page, it certainly worked for him.