www.travelandshortbreaks.com Stonehenge Prehistoric Monument Site Salisbury Wiltshire England UK . Except on special occasions, visitors are unable to walk amongst the stones. The site and its surroundings were added to the UNESCO's list of World Heritage Sites in 1986 in a co-listing with Avebury henge monument, and it is also a legally protected Scheduled Ancient Monument. Stonehenge itself is owned by the Crown and managed by English Heritage while the surrounding land is owned by the National Trust. Stonehenge Prehistoric Site Salisbury Wiltshire is a visit not to be missed.