Stonehenge on Salisbury plain in the United Kingdom is one of the most enigmatic prehistoric monuments dating as far back as 5000 years ago. A masterpiece of the neolithic age, Stonehenge is a massive stone monument built circularly with sarsen stones and bluestones. Archeologists have touted Stonehenge to be part of a larger sacred landscape with many other stone structures. Walk around the circular path for a 360-degree view of the structure. Visit Round Barrows, a large mound in the surrounding fields believed to have been burial sites. Watch the iconic Heel stone at the end of the circular path. Weighing around 35 tons, the heel stone is aligned with summer solstice sunrise and winter solstice sunset. Learn about the history of Stonehenge, artifacts, the life of people who lived there at the museum on site.