Introduction to the Megalithic Archway: The megalithic archway in the center of Stonehenge uses a boulder with a maximum height of 8 meters and an average weight of nearly 30 tons as pillars. The top frame uses a stone beam weighing 7 tons as a lintel, which is closely connected to form a colonnade. People at that time How those huge stones weighing 7 tons were placed horizontally on two vertical stone pillars is still unbelievable.
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