Casa-torre de Torrebarri Monument · Plentzia, Plentzia-Mungia, Bizkaia Tower house in Plentzia bearing a 1603 coat of arms of the Butrón family, with one of the oldest known epigraphic inscriptions in Basque. 1603 Photo: Vanbasten 23 (CC BY-SA 3.0) What to see and do in Plentzia