You may spot Cathedral of San Pietro across town before you actually find this amazing religious building. Step inside if it's open or just admire the facade from the street.
You'll soon see why this Tempio Pausania principal church is a hit with travelers. If you're looking for other things to keep you busy, Mount Limbara, Nuraghe Majori, and Rinaggiu Springs are in the area as well. They won't take you very long to reach from Cathedral of San Pietro.