I visited Wiltshire in 2004 and in 2007. In 2004 I was staying in Aylesbury, Northwest of London. I drove down to Stonehenge skirting past Oxford and into Marlborough, a very nice little village on the way to both Avebury Henge and Stonehenge. Also near Marlborough are Silbury Hill, the oldest and largest "burial mound" in all of the UK and Europe, and West Kennett Longbarrow. The latter requires a walk up a modest sized hill however once you arrive the views of the surrounding countryside are just magnigicant. Continue your drive down the A345 and continue on the A303 to Stonehenge, you won't be disapointed. Its truly a magnificant site and the walking tour around the henge is fantastic, be sure to use the portable telephone system as part of the tour. It explains the history of the area. Wiltshire is one of the very best places I have ever been to.