Signols is located on the National Road to Bardonecchia at 1105 m. above sea level. The little Saint Sixtus Pope church is situated near a bitter water fountain dated 1866. Here there were the quarry and the gypusm factory ; nowadays some farmer take care of the fields and meadows and raise cows and sheep. The Signols Gypusm Quarries, used till seventeen century, are of great interest from a landscape, environmental and mineralogical point of view.They are inserted in the “Sito di Interesse Comunitario “SIC” called “Oasi Xerotermica di Oulx – Auberge” characterized by a dense forest of pine. In the Forest there are some rests of a cableway and quarry structures while in the gypsum wall open some galleries. The area is important for the mineralogy researchers because in 2006 was discovered the Ambrinoite: potassium sulfo hydrated salt, unique in the world.