Atxorrotx is first mentioned in medieval documents as Aitzorrotz, Aizçorroz or Aitz Çorriz, and the name means “jagged rock”. It is situated in the ancient parish of Bolibar in Eskoriatza, within Aizkorri-Aratz Natural Park. The surroundings are of great natural wealth and boast a diversity of landscape. However, the highest point of this natural spot is the archaeological site of the Atxorrotx castle, given Monument status by the Basque government in 2012. The first written references date from the 12th century.

Archeological excavations carried out in the last few years have revealed the perimeter of the watchtower, a well and other medieval remains. There is an information panel that helps you understand the medieval vestiges existing below the Santa Cruz shrine which stands on the site today. A popular pilgrimage takes place on the first Sunday of May, and a 7.5 kilometre walk named “El Castillo de Eneko” has also been marked out. Starting at Eskoriatza and ending in Leintz Gatzaga, the walk takes around 2 hours and 45 minutes to complete.