S'Arcada S'Ozzastru is located on the upper section of the canyon of Codula de Luna on Supramonte di Baunei (near the village of Cala Gonone), Sardinia Island, Italy. The arch situated up on the cliff of the canyon is difficult to reach and also hard to measured. The opening has probably over 30 meters of span. S'Arcada means arch or arcade in Sardinian dialect.