Some think it is a solar calendar that predicted the sunrise, sunset, eclipse, moonsets and moonrise while others reckon it as a place for worship. The reasoning for Stonehenge remains a mystery. Some authors state the supernatural must have played a part in the construction of Stonehenge reasoning the stones were too heavy making impossible for anyone to move and carry therefore making Stonehenge a much bigger mystery. Whatever the reason, the circular landmark of large standing stones is a wonder to everyone as Stonehenge dates back as far as 3100 B.C. the estimated built time.