The area is made up of limestone rock formations and there are many underground water currents which is why there are lots of caves and caverns. Several rivers run through this area: the Altube, Arnuari, Zeberio, Arratia, Bayas and the Undabe.
The park consists of Mount Gorbea and the surrounding mountains. The highest peaks are: Gorbea or Gorbeia at 1482 metres above sea level; la Peña Aldamin at 1373 metres above sea level and las Peñas de Itxina.
This park has become a leisure area for the citizens of Bilbao and Vitoria. Popular sports here are: horse riding, mountain bike riding, hiking, fishing, bungee jumping, climbing, mountaineering, canoeing.
Features of the Sierra de Gorbeia Nature Park:
La Sierra de Urkiola Nature Park: This area became a park in 1989. It covers 5,768 hectares and includes the following towns and villages: Amorebieta-Echano, Achondo, Abadiano, Durango, Dima, Izurza and Msñaria. It consists of the Aramotz-Eskubaratz mountain range (the Mugarra mountain is very pretty), the Duranguesado mountains and the Aragio mountains. The highest peak is Amboto at 1331 metres above sea level, Alluitz at 1043 metres and Saibi.
This park consists of karstic rock formations with multiple caves where prehistoric fossils have been found. Popular sports here are horse riding, mountain bike riding, hiking, fishing, mountaineering, climbing and canoeing.
Features of the Sierra de Urkiola Nature Park:
The Urdaibai Nature Park: This covers 23,000 hectares and goes along the Gernika-Mundaka estuary which stretches 12 kms and is up to 1 km wide in some places. The area forms the largest wetland in the Basque Country. It includes the following towns and villages: Gernika, Bustuna, Sukarrieta, Mundaka, Bermeo, Kanala, Burritxana, Elautxobe, Ereño, Errigoiti, Forua, Gautegiz, Arteaga, Ibarrangelu, Kortezubi, Mendata, Morga, Munitibar-Arbatzegi Gerrikaitz, Murueta, Muxika, Nabarniz, Ajangiz and Aramaio.
The highest peak here is mount Oiz at 780 metres high. In 1993 UNESCO declared the area to be a Biosphere reserve. The park enjoys a variety of microclimates something which is demonstrated in its rich vegetation.
This area is popular for the following sports: diving, surfing (especially Mundaka), climbing, hiking, cycling, canoeing, sailing…
Features of the Sierra de Urkiola Nature Park:
Gaztelugatxe Protected Natural Area: This is in Bermeo. It is an island connected to the mainland by a bridge. Located between Matxitxako and the village of Bakio. The island was granted special status in order to protect an important colony of birds that live on it. It is also significant for its orography.
There is a 9th century chapel (la Ermita de San Juan) which belonged to the order of the Templars, to reach it you need to climb 237 steps. From the chapel you get some great views over the cliffs. Following many transformations over the centuries the chapel was rebuilt and reopened to the public in 1980.
A good area for diving. However, the beaches in this area are full of pebbles.
Features of Gaztelugatxe Protected Natural Area: