Fortaleza de Marueleza y campamento de Iluntzar Historical milestone · Nabarniz, Gernika-Bermeo, Bizkaia Image of Nabarniz, not of the place itself. The fortress of Marueleza stands on Mount Arrola, and on Mount Iluntzar (728 m, the highest point in the municipality) a Roman-era camp has been documented. Photo: Txo (CC BY-SA 4.0) What to see and do in Nabarniz