The domus de Janas (or ‘fairy houses’) are set along the sides of a trail and they contain worship and funerary symbols, together with architectural elements of Neolithic huts so that the dead may have a home for eternity. The Mesu e Montes necropolis is located about 7 km from the town of Ossi, dug into a limestone layer on the southern slope of Mt. Mamas. There are 18 domus de Janas, all with more than one room, located on either side of a trail. They seem to have been excavated and used starting in the 3rd millennium BCE, from the Neolithic period to the end of the Bronze Age. Two of them, tombs III and XVI, show an architectural transformation leading to the style of the Giants’ tombs, with arched stele carved into the entrance, exactly as in the subsequent burials of the Nuragic period. Tombs I, II, V and XIII are of particular note for the more elaborate decorations they contain.