Barnenez — the Cairn That Was Sold for Gravel
Stand at the southern end of the great cairn at Barnenez, on a headland in northern Finistère where the wind comes straight off the bay of Morlaix, and put your hand flat on the dry-stone wall. Granite and dolerite, fitted without a drop of mortar, still holding their line after roughly six thousand eight hundred years. This is one of the oldest standing buildings anywhere on earth. It went up two thousand years before the pyramids of Giza. It is far older than Stonehenge.