산 콜롬바노 체르테놀리 최고의 MTB 라이딩 경로

Pria Burgheisa (Pietra Borghese) is a massive outcrop of mantle peridotites, among the best-known and most significant in the area. It lies on the southwestern edge of the Prato Mollo plateau, on the southern slopes of Mount Aiona, at an altitude of 1,465 m. It is a geosite of considerable petrographic, mineralogical, and regional geological interest, allowing us to study the evolution of a portion of the lithospheric mantle subsequently involved in the Apennine orogeny. The outcrop has a highly irregular shape: 30 m long, 10 m wide at its maximum, and 7–8 m high. The rocks are dark in color, ranging from blackish to brownish; the mass is affected by three main fracture systems, more or less orthogonal to each other, which fragment it into numerous square-shaped blocks. The surface of the blocks has a pitted appearance, as the pyroxene crystals, more resistant to erosion than olivine, remain prominent. At the outcrop, mantle foliation is evident, due to the presence of frequent pyroxenite bands. Source: Liguria Geosite Registry.

Not far from the Aiona–Pratomollo Refuge, near the dirt road, you come across Pietra Borghese, a truly unique rocky outcrop. At first glance, it may seem like a simple dark mass that emerges from the pastures, but it is actually a very ancient rock, among the oldest in Italy: it is over two billion years old and actually comes from the Earth's mantle. Its composition, rich in magnetite, causes compasses to go crazy in the surrounding area, and it is not uncommon for its summit to be struck by lightning during storms. Some legends have also developed around this stone, including one that wants it to be a meteorite that fell from the sky. In reality, its true charm lies in its deep geological origin, which tells an ancient story linked to the birth of the Apennines and the disappearance of a prehistoric ocean.

excursion done in winter, very beautiful and panoramic, with a lot of snow, good equipment is needed, gaiters and crampons, and a good shell for the strong winds on the ridge.

722 s. l. m.

Borgonovo Ligure is a fraction of Mezzanego, nestled along the Sturla Valley. It is famous for the "craziest house in the world", a bizarre and colorful building that overlooks the provincial road 586.

Monte Aiona loop starting from Malga Perlezzi passing through Prato Mollo - Passo della Spingarda - Incisa - Casermette del Penna - Passo del Cereghetto - Agoraie and Lago di Giacopiane.

In the photo: on the left you arrive from San Martino, in the center downhill dirt road to Aveggio. On the right, continue towards Romaggi.

Very beautiful and well-trodden path (I recommend)