The megalithic tomb at Gavrinis is on an island in the Gulf of Morbihan. This is accessible by a short boat trip from Larmor-Baden (Breton: An Arvor-Baden). The Gavrinis Tumulus stands at a height of about 20ft and 165ft in circumference. There are twenty-nine upright stones which lead via a passage to a large chamber. This chamber is topped with a large square stone of about 13ft. There are carvings and three holes cut into the rock of one of the chambers.
On going into a passage leading to the inner chamber, there are two prominent stone sills on the floor. There are designs carved on the threshold of the inner chamber. There are also intricate carvings on nearly all of the slabs of both the passage and the chamber. The Gavrinis monument is a passage grave and thought to have been built around 4000 BC.
Link and Image: Courtesy of Office de tourisme de Carnac