Introduction to the main body of Stonehenge: Around 3100 BC, the first phase of the construction of Stonehenge began. People first dug a circular dry trench, and placed a stone obliquely on the outside of the trench, and placed a stone on the inside of the trench. Some earthen altars were built, with 56 earthen pits in the altars; from 2100 BC to 1900 BC, people placed huge blue sandstones in them, with huge stones as pillars and a huge stone lying on them as lintels, forming a 30-meter-diameter On the left and right circles are horseshoe-shaped stone archways, forming the prototype of Stonehenge.
In the next 500 years, people took the trouble to rearrange the positions of these boulders many times. Judging from the existing ruins, this ring-shaped stone pillar group is surrounded by an earth embankment with a diameter of 120 meters. The stone is 6 meters high. The block weighs 30 to 50 tons. Above the stone pillars are thick stone lintels, which are closely connected to form a colonnade shape. There is a huge stone arch on the east side of the earthen wall outside the stone ring. The entire structure is horseshoe-shaped, and there are 5 door-shaped doors in the stone ring. The stone towers, with a total height of about 7 meters, are arranged in a centripetal circle.