The remaining stones of this ancient burial chamber sit in their own grassy sanctuary amid a little enclave of holiday bungalows in Newport. The Cadw noticeboard (the official Welsh heritage service that cares for such monuments) says it was built around 6,000 years ago. Long ago excavations inside the tomb uncovered cremated bone, stone tools and pottery belonging to the Neolithic period. These days the huge capstone balances on only two of the four upright stones. Once, too, the whole structure would have been covered by a mound of earth as at Pentre Ifan.
Carreg Coetan is one of several similar tombs along the River Nevern valley, all lying in sight of the craggy top of Carn Ingli mountain. That it survives now so well embraced by 21st century domesticity is either heartening or incongruous depending on your view. I rather like it. It reminded me of Brittany and coming upon a similar burial chamber that had been incorporated into the structure of a farmyard shed, the capstone providing a substantial door lintel, and elsewhere a long barrow whose gallery served as the crypt for a village church built in medieval times. It could anyway be timely to tap into some ancestral thinking. I feel they might tell us to review our values and pdq.