And on the inside one can see how it was constructed; stones going round and round in ever decreasing circles. One can still see evidence of fire on the blackened back wall and ceiling.
It's an ancient borie. Not our usual type, which is smaller and has an actual flat stone roof, but a very ancient variety of unknown age. I quite expect its original inhabitants dressed in animal skins, and knew nothing of Christmas or roast Turkey.
It lives in the woods, a pleasant 4 Km dog-walk from our house. I wonder how many people even know it's there?