Monte Albo, Limestone mountain summit in Sardinia, Italy

Monte Albo is a limestone mountain range located between the towns of Lula and Siniscola, extending for approximately 20 kilometers. The highest points are Punta Catirina and Monte Turuddo, reaching around 1,127 meters (3,698 feet).

Monte Albo is a limestone and dolostone massif of Middle Jurassic to Lower Cretaceous age, deposited on a Palaeozoic metamorphic basement of phyllites, schists and gneisses. Uplift and tilting along NE–SW and E–W fault systems, linked to the Pyrenean and Apennine orogenies, produced its hogback profile, and overthrusting on the Nuoro Fault placed younger carbonates over the basement. Karstification, active since the Neogene, carved the sinkholes and shafts.

The mountain's name comes from its white limestone composition, which stands out clearly from a distance. Local Sardinian language variants include Monte Albu and Monte Arbu, reflecting the region's linguistic heritage.

The mountain is accessible from several trailheads: Punta su Pigio in the northeast, Punta Cupetti in the north, and Punta Ferulargiu in the northwest. Each entry point offers different routes, so choosing your starting point depends on your preferred path and available time.

The massif's karst includes the Tumba 'e Nudorra sinkhole, about 45 by 30 metres, and vertical shafts over 100 metres deep such as Tumba 'e Nurai. Underground rivers resurface at the Locoli spring after heavy rain. The Monte Albo cave salamander (Speleomantes flavus) lives nowhere else on Earth.