The ancient structure found in Stonehenge is simply referred to as Stonehenge itself. Located in Wiltshire, England, it consists of a circular arrangement of massive stones, some weighing up to 25 tons, arranged in a series of concentric circles. Stonehenge dates back to around 3000 BC to 2000 BC and is considered a prehistoric monument. Its purpose remains a topic of debate among historians and archaeologists, with theories ranging from astronomical observatory to sacred burial site. Stonehenge remains one of the most famous and studied archaeological sites in the world.