Domus de Janas and menhir
On the territory of Gairo, like on the territory of Sardinia in general, some traces of the pre-nuraghic life (2.500 - 1.800 B.C.) can be found. Five Domus de Janas of Bacu Arista in the marine and those of Scalarrana in the mountains, where the Rio (River) Pardu and the Rio Sarcerei merge (close to the new settlement of Gairo), bring us back to the 3rd millennium B.C. “Domus de Janas” translated from Sard means “homes of fairies”. In fact, they are small ravines in the rock, which origin is still controversial. Their name derives from their small dimensions which made the first discoverers assume, that those ravines were home of little elves. However, these ravines are supposed to have been made by the ancient people for religious or burial purposes. This theory was verified after having found some bones inside them.
Three menhir, situated along the ancient Eastern Road that crosses the plain of Foddini (today it's the territory of Cardedu) near the coast, date back to the same period. These are ritual one meter high stones of conical form.