Oppidum de Arrola and Arrolagune
Oppidum de Arrola is one of the most important indigenous towns of east Cantabria and has occupied the summit of this mount for 23 centuries (4 B.C to 1 AD). It was the population centre that governed life in Urdaibai until the 1st century, covering 40 acres. These types of fortresses or hill-forts were the usual settlements during the Iron Age, Arrola being the best preserved of Biscay.
Arrolagune is the Interpretation Centre of Oppidum de Arrola. It recreates life in the town and shows this site in detail, a key to learning about the history of Biscay. The display, through panels and reproductions, is a tour through the history of Europe in the Iron Age II and show the importance of its imposing defensive walls. It also informs about the ways of life of the town and of its funeral world.