Wikipedia
Round barrow
A round barrow is a type of tumulus and is one of the most common types of archaeological monuments. Although concentrated in Europe, they are found in many parts of the world, probably because of their simple construction and universal purpose.
Usage examples of "round barrow".
Their hill was likely some old round barrow - the hummocks in this basin were far too regular to be natural.
It was like a small round barrow or cairn, but it stood where no barrow or cairn should be, atop the long flat horizon of the edge of the world.