Carnac stones
Kercado: A rare dolmen still covered by its original cairn. South of the Kermario alignments, it is  wide,  high, and has a small menhir on top. Previously surrounded by a circle of small menhirs  out, the main passage is  long and leads to a large chamber where numerous artifacts were found, including axes, pearls, arrow heads and pottery. It was constructed around 4600 BC and used for approximately 3,000 years.