The beach of Is Mortorius is found in the locality of the same name, in the municipal area of Quartu Sant'Elena. The seashore is made up of various sized grains of gravel, from sand to rock. Its waters are of a changing blue due to the plays of light created by the sun reflected on the seabed of stones. A strip of rock stretches out, smoothed by the sea, and inhabited by typical fauna of limpets and sea urchins. Nearby, are the two bays of Baia Azzurra, hemmed in by vegetation and bluffs.