Gorbea

Gorbea or Gorbeia is a mountain and massif, the highest in Biscay and Alava, with a height of 1,481 m AMSL. The massif covers a wide area between the two provinces. The main mountain is a round grass-covered summit where a 20-metre-tall metallic cross has been constructed to reach the altitude of 1,500 m. Other important mountains of the massif are the Berretín, Lekanda and Aldamin limestone peaks.

Part of the massif is delimited North by the high karstic plateau of Itxina, an intrincate landscape of limestone full of shafts and caves such as Supelegor. The Atxular's Eye cave is the only walking access to the plateau.