Arnuero: Marshland, Trails and Cultural Heritage

If you’re looking for a hotel in Arnuero, you can choose your destination based on the activities you have planned: the municipality brings together marshland and cliffs, hiking trails and cultural monuments. This lets you decide in advance whether to focus on nature, a circular route or individual historic sites.

Landscapes between marshland and coast

The Marisma Joyel is an estuary located mainly in Soano, in the municipality of Arnuero, and is part of the Marismas de Santoña, Victoria y Joyel Nature Park. The Acantilados de Isla lie between the Rías de Quejo and Castellano. In some sections, their cliffs rise more than 50 metres above sea level; a route there is easy to walk from either end. At the Ría de Castellano, the mouth of the Campiazo forms the natural boundary between Arnuero and Bareyo and is designated a Site of Community Importance (SCI). Monte Cincho is designated as an integral reserve within the nature park; it is home to a relic stand of holm oaks.

Hiking trails and different destinations

The Huellas Route is a circular trail through cultural landscapes, holm oak forest and marshland. It also showcases a selection of important civil and religious buildings that form part of the region’s cultural heritage. The route is less than 13 kilometres long, has no particular difficulties and is suitable for all visitors; most of it follows small roads. Local conditions may vary, so check them before setting out.

The Ruta Ría Castellano has a different focus: it follows local roads and paths to the mouth of the ria, where Playa de la Arena beach is located. While the Huellas Route is a circular trail that brings together landscape and cultural heritage, the Ruta Ría Castellano leads to a specific coastal destination. Another option for planning your route is the Camino de Santiago del Norte. One section passes through the municipality of Arnuero; at the entrance to Castillo, the official route offers two alternatives. Check the route locally before planning to take this trail.

From the viewpoint on Monte Cincho, the view stretches from the Cantabrian Mountains in the south to the coast between Santander and Bilbao.

Nature and orientation in the Trasmiera Ecopark

The Trasmiera Ecopark consists mainly of tidal marshlands, home to thousands of migratory birds. Educational trails and a visitor centre provide information about the area’s industrial, landscape and natural heritage. The European Commission awarded the Ecopark the title of European Destination of Excellence (EDEN) for its sustainable tourism offering. In the Marisma Joyel, you can take a self-guided circular walk from the car park on the CA-449. The Casa de las Mareas is the Ecopark’s main visitor centre and provides information to help plan cultural and nature visits.

Church and crafts

Cultural sites include the parish church of San Julián y Santa Basilisa de Isla. It is a protected cultural monument and is one of Cantabria’s finest examples of a hall church. Its English-Romantic organ is unique in Cantabria and was built around 1890. The church also houses a richly decorated 17th-century polychrome high altar. The Observatorio del Arte complements the picture of regional crafts with an educational, interactive exhibition. It shows how the artisans worked and presents some of their important works in Arnuero and elsewhere in Trasmiera and Spain.

Discover more destinations: Isla, Bárcena de Pie de Concha, Puente Viesgo, Santa María De Cayón, Cohiño, Silió, Mazcuerras, Herrerías.

For the regional travel overview: Cantabria.