This unusual Natural Monument can be found on Monte Cépera (also known as Cuccureddu ‘e Zéppara or Monte Zéppara). The mountain, 167 m a.s.l., stands in the town of Guspini.
It features the fracturing of basalt rock which produced the “columns” that resemble “organ pipes“. This particular formation came about after the magma cooled which rose via an effusive eruption of the marine volcanoes, during plio-quaternary volcanic events.
The site, previously the subject of mining activity, has an emerging wall of vertical basaltic prisms, standing about twenty metres high, on the quarry front. While there are other similar basaltic formations on the island, like the basalti del Gollei or Cabu Nieddu in Oristano, the specimens of Guspini are particularly significant for their incredibly precise cut which nature has created on the rocks.
Easily accessible in the town, it was given Natural Monument status in 1994.
