Legend has it that an old spinner transported the Filadoira Stone on her head across the mountains from San Roque to the Entrerríos Range without stopping spinning to place it as a cover on a dolmen.
Legends apart, the oldest trace of man in these highlands of the Navia Basin is that of the first communities linked to a food production economy. Linked to livestock breeding and the incipient farming of the territory, they did not give up the traditional activities of hunting and gathering. These groups were the builders of the first known monumental architecture, dolmens, stone circles and diverse burial mounds. These megalithic burial constructions do not lack a certain regional context.
Entrerríos necropolis consists of five burial mounds. One of these is known as the Entrerríos Dolmen. It has a polygonal chamber, from which the base stones that closed off the north side have disappeared. The entrance, located to the east, would have been through an unfinished corridor consisting of two blocks arranged in parallel, with a large chamber above topped off by a large covering block.