Quadrilataire de Manio

After a fairly long walk through the woods past some freindly horses in a field, we come to a stone rectangle, after seeing so many stone circles back home this rectangle was a real oddity that I just had to inspect in fine detail.
The stones are fairly low 1 to 2 feet at most, except two on one of the long sides which look like an entrance, if a little constricted .Apparently restored quite recently. Only yards away is the Giant of Manio, a real whopper