Stonehenge, the most famous prehistoric monument in Britain, is situated on Salisbury Plain in the county of Wiltshire. At various times regarded as a site built by the Druids, the Romans, the Danes and even the French, the first stage – a circular ditch and bank with an entrance flanked by a pair of small standing stones – is believed to have been built around 3,000 BC. The site was subsequently abandoned and rebuilt between 2100 BC and 1800 BC.

There are many mysteries surrounding this ancient site. Some of the stones used are thought to have come from the Preseli Mountains in Pembrokeshire, Wales – yet exactly how they were transported to the site is a puzzle.

It has been suggested that Stonehenge once operated as a massive astronomical clock, and there are even suggestions that it was a landing site for Unidentified Flying Objects. A more likely explanation is that Stonehenge was an important centre of worship connected with the sun.

English Heritage is responsible for the protection of Stonehenge and provides information on visiting the site.