Watch Online Free FlixHQ. For 5,000 years the sacred site of Stonehenge has stood on the plain of Salisbury, a silent witness to the world's history. Though the elements have taken their toll on the giant stones that comprise the prehistoric circle, a myriad of mysteries remain. Who built Stonehenge? Was it the Druids or Merlin the Magician? Why was it built? Was it a landing pad for UFO's? An altar for human sacrifices? An astronomical computer? Modern Technology, combined with the sciences of anthropology, archaeology astronomy have provided us with a glimpse of the life...and death of the Stonehenge people. Via interviews with world-famous archaeologist and Stonehenge experts we will explore many of the lingering mysteries that have enchanted and enthralled us for 5 millennia.