Poskær Stenhus is the largest round barrow in Denmark, dating back to 3.300 B.C. It is by the village Knebel on the hilly southern part of the peninsula, Djursland, at the entrance to the Baltic Sea between Denmark and Sweden in northern Europe. The central burial chamber is equipped with a capstone weighing 11 tonnes, surrounded by 23 slabs taller than a man, forming a circle.
The capstone is the lesser half of a granite slab brought to Denmark from Northern Scandinavia by ice age glaciers' movements. The underside is remarkably flat, and possibly split from another half, by the dolmen builders.
Wikipedia https://en.wikipedia.org/wiki/Poskær_Stenhus
Address 23 Porskærvej, 8420, Denmark
Coordinates 56°13'6.653" N 10°30'7.277" E