A burial mound is a mound of earth and stones raised over a grave or graves.
No, they are burial mounds :)
The Adena Mound
Kumamoto Prefectural Ancient Burial Mound Museum was created in 1992.
it was a burial place for important cheifs
Early prehistoric burial ground
An ancient burial ground
Archaeological evidence found by the Stonehenge Riverside Project in 2008 indicates that Stonehenge could have been a burial ground from its earliest beginnings
Newgrange, Ireland
Mound(s)
Mound Builders had a very extensive trade network
They were important because the mound builders used them for burial chambers and temples, and religion was an important part of the mound builders culture.