The Giara falls entirely within the definition proposed by W.A. Wimbledon (1995) in which “a geosite can be defined as a location, area or territory in which it is possible to identify a geological or geomorphological interest for conservation”. In fact, the database of The Department Nature Protection of ISPRA classifies the area as a rare geological site of major scientific interest because of its geomorphological, palaeontological and volcanological characteristics.

In addition, the territory of the Giara is itself a container of geosites of scientific/naturalistic interest. Among them, the volcanic emission centers of Sa Zepparedda and Zeppara Manna, volcanic cones whose lava flows formed the basaltic plateau of the Giara; the paulis, which are temporary ponds distributed across the top of the Giara; the waterfall of Su Strumpu; and many wellsprings, which are mainly present near the layer of lava and the Miocene base.

You can visit the sites of Duidduru (Genoni) and Manna Muru Genna 'e Cubeddu (Nureci), which still retain the geological history of the area and the history of the beings who have populated it. The rocks and fossils testify to the presence, both million of years ago and today, of an environment containing a large variety of species.

The “Banco a Turritelle" of Genna Manna and the Duidduru fault, which testifies to the tectonic movements that have affected the region, are both worth mentioning.