The Hernio-Gazume area is a calcareous formation composed of karst caves and rocky peaks. It has been declared as a Special Area of Conservation and is part of the Natura 2000 network. In total it has 2,160 hectares spread among the municipalities of Aia, Albiztur, Alkiza, Asteasu, Bidegoian, Errezil, Hernialde, Larraul and Tolosa. The area is a haven for countless species of flora and fauna and it is also home to a large number of species of special biodiversity interest. At the top we can find hawks and Griffon vultures and as well as Montagu's harriers nests. Winding down we find grasslands and mixed forest composed of elm trees, maple trees, linden trees, ash trees and hazelnut trees. Many species of bats live in the numerous caves and abysses of the area
Fagus Alkiza Interpretation centre has been set up to maintain and disseminate the wealth of the mountains and forests of Hernio-Gazume as well as to conduct research on relationships between nature and human beings.
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To see the hiking routes visit the Urola Trails Network