Cala Bernardu, situated on the western coast of Bosa, lies on the untamed promontory of Capo Marrargiu. This area is part of the Site of Community Interest (SCI) known as "Hinterland and coastal area between Bosa, Capo Marrargiu, and Porto Tangone." The protected region spans the coastal zones of Bosa and Villanova Monteleone, as well as other inland municipalities. It was established to safeguard biodiversity by conserving natural habitats. Notably, this area is recognized as the most crucial site in Sardinia, and nationally, for the nesting of the Griffon vulture (Gyps fulvus). Visitors can often observe these majestic birds soaring high, skillfully riding the thermal currents. Cala Bernardu beach features pebbly shores, encircled by dark volcanic rocks of an effusive nature. The path to reach the beach traverses a wild landscape marked by dense scrubland, predominantly wild olive trees and mastic trees, with a rich presence of euphorbias and brooms. Near the sea, you can find sea fennel (Crithmum maritimum), Evax rotundata, Helicrysum italicum, and other endemic species. The beach is accessible by boat from Bosa, though approaching the coast is hazardous due to the presence of emerging or semi-submerged rocks. On foot, it requires at least an hour's walk. You can park your car at km 14 of the provincial road 49 Bosa-Alghero, in an open space adjacent to the road. From there, take the dirt road that descends southwest towards Coile Calchinadas, then continues to Coile Sas Bagassas, and finally heads south to reach Cala Bernardu.