Mysterious Megalithes...(Hunebedden in Dutch)

Older than the Egyptian pyramids. Built of huge granite stones, some of them weighing over 25,000 kilograms, dragged to the spot and piled up to form a rectangular stonegrave. "Hunebedden", there are still 54 of them. 52 in the province of Drenthe and 2 in the adjacent province of Groningen.