Review: The Documentary ‘Stonehenge: Land Of The Dead’ Exposes Secrets Of The Prehistoric Monument And The Neolithic Community That Made It Stonehenge is surrounded by a "henge"—a circular structure of earthen bank plus ditch. Nearby, a henge surrounds what was once a Neolithic agricultural community. Recently, nine human-made pits encircling the two henges were discovered. What do all the circles have to do with each other?