Hidden Stonehengeis the remarkable chronicle of one man's thrilling quest to solve a profound archeological mystery. On the remote plains of southern Alberta sits an ancient temple older than England's Stonehenge by some 800 years. Yet, like Stonehenge, it features a built-in calendar of astonishing accuracy. Incredibly, 5,000 years ago, Britons and Plains Indians were making precise astronomical observations at these two sites. Follow Professor Freeman as he explores the astonishing implications of his discoveries.