On the west of Bizkaia there exists the land known as Encartaciones, “The Chartered Towns”, a succession of green and mountainous valleys that hide beautiful places with a long mediaeval tradition, and that have always been a “different” part of Bizkaia. They had their own Casa de Juntas de Avellaneda, an ancient way of ruling themselves, parallel to the one in Gernika, and still there. But, once again, you will see no tourists at all on this area, probably the least visited in Bizkaia, despite its enormous offer of interesting attractions for those that seek the “untouched” areas. Basque is hardly spoken on this area.
Among its several attractions, the town of Balmaseda, with its mediaeval bridge and the amazing church of Saint Severino. They hold a magnificent live recreation of the Passion of Christ on Easter (Holy Week). Not far, the best and biggest Rolls Royce museum in the world, already mentioned on this blog. Also, the Ferrería del Pobal, a faithful recreation of how ironworks were made in the past centuries, using just the force of watermills and fire. This land used to be full of iron mines and has a long tradition of ironworks, as most of the Basque Country. In Karrantza you have the Pozalagua Caves, the biggest cave in the world in its part known as Torca del Carlista (500 mt long, 240mt wide and 135mt high), with the highest concentration on earth of unique excentric stalactites and stalagmites of all shapes, even the weirdest ones.
For fun, Karpin Abentura, www.karpinabentura.com, a place where wild animals are treated from injuries and live in its spacious areas and also where kids will enjoy the “live” dinosaurs. Also, a great place for families is Sopuerta Abentura, https://www.sopuerta-abentura.com/, fun in the trees…
Regarding food and accommodation, I can recommend Hotel Amalurra (www.amalurra.com), a different experience, it offers a complete Spa service and great food in its nice restaurant. Perfect for relax and to enjoy nature, it has huge gardens and children are most welcome. Also, the very new Hotel Ibaia, luxuriously located on an ancient convent in Gordexola, beautiful town full of palaces and manor houses (and where my grandpa was born, by the way), www.hotelibaia.es. Also, a very special place is www.casavicentepallotti.com, a balneary run by the Palotinos Fathers, Catholic priests, for those that look for relax and meditation in a romantic scenery. And almost any restaurant in the area of good, honest food at unbeatable prices.
Useful info on the area on www.enkartur.net and www.karrantza.com.