Six themed cultural routes lead to Erandio’s geological origins, its beginnings as an anteiglesia, and its industrial past. They range from landforms to historic paths and buildings. When planning your visit, you can first decide whether you’d like to explore Erandio through its geology, architecture, or the history of work and transport.
Routes between the volcanic landscape and the estuary
The Geological Route passes through volcanic rocks and lava flows; a visible crater is another geological feature. A different sequence of landscapes is found on the Enekuri–Erandiogoikoa Route, which follows the meanders of the Asua River between the eastern slope of Monte San Pablo and the Txorierri Valley. These cultural routes bring geological formations together with a route shaped by river, hillside, and valley.
The La Vega de Altzaga Route is a 1.7-kilometre walk of low difficulty, with an estimated duration of 25 minutes. The Ría-Erandio Route has a different focus: this almost straight walking and cycling path is less than ten kilometres long and runs along the right bank between Bilbao and Leioa. It leads to Erandio without straying far from the estuary. The two routes therefore differ in their stated length and in that both walking and cycling are mentioned for the Ría-Erandio Route.
Metro Line 1 serves the Ría-Erandio Route, with stations in central Erandio and in Lutxana and Astrabudua. As transport services and station operations can change, check the current timetable before travelling.
Industrial history and everyday routes
The Astrabudua–Lutxana Route follows a riverside path that historically connected the inland area with the coast. Women in particular used it to tow ships upstream to Bilbao with a towline. Alongside industrial development, the route also brings to light the work that supported shipping on the estuary.
In the higher part of the municipality, the Goierri de Erandio Route passes mills, farmhouses, towers, and hermitages, away from the industrial activity on the estuary. A striking example of industrial architecture on the right bank of the estuary is the Compañía Española de Pinturas La Internacional, considered iconic.
The Tartanga washhouse also tells the story of public infrastructure and everyday life: Erandio Town Hall had it built in 1893 to plans by master builder Casto de Zabala, as part of improved hygiene measures. It was used for washing clothes until around the 1970s.
Churches and historic buildings
The Church of Santa Maria is believed to have existed as early as around 1300. The present Late Gothic building dates from the late 15th century and is dated to around 1490. Its architecture is defined by three Gothic portals with archivolts and slender, fluted columns with simple capitals, as well as a bell tower. Outside the church stands the Martiartu tomb, one of the outstanding examples of Gothic funerary sculpture in Bizkaia.
The Torre de Martiartu is a 16th-century Renaissance building on the slope of Monte Umbe, in the Goierri district. It served both as a residence and a defensive structure, and was almost always inhabited from its construction until it fell into disrepair. In 1923, the La Esperanza cooperative housing estate was established in Altzaga. Its members worked at the Sociedad Española de Construcciones Navales. The city architect Ángel Líbano designed the estate in the Neo-Basque style. Together with the Church of Santa Maria, these buildings illustrate different chapters in the area’s history, from religious architecture to workers’ housing.
Astrabudua Wetland
Astrabudua Wetland lies on the boundary between Astrabudua and Leioa and is home to a wide variety of animal and plant species. Its ecological conditions may change over time. The wetland adds a nature-focused element to the routes and buildings, distinct from the geology of the Volcanic Route.
Discover more destinations: Barakaldo, Balmaseda, Lekeitio, Gernika, Plentzia, Ortuella, Nabarniz, Zamudio.
For the broader travel overview: Bizkaia.
