Dunes of Liencres and Costa Quebrada Natural Park

One of the largest systems of dunes on the northern coast of Spain, Liencres is home to a wealth of flora and fauna.

In addition to one of the most important dune enclaves on the Cantabrian coast, this park also includes the surrounding coast, part of the Costa Quebrada Geopark, as well as the nearby islets, the Pas River estuary and part of Mount Tolío. The result is a highly unique space given its great combination of attractions: scenic, geological, botanical and fauna.The dunes, which initially was almost the only area of the park, which was later extended, are located on the left bank of the mouth of the Pas, in a peninsular area bordered by the Mogro estuary and several adjoining beaches. The sandy mountains have gradually become consolidated by reforestation with maritime pine (Pinus pinaster) carried out there in the mid-20th century.The dunes and estuary are home to numerous species of aquatic birds, such as the great plover, the common sandpiper, the grey plover, the black-winged curlew and others that have chosen this area as a resting place on their migratory journey. There is also an impressive population of lizards, snakes and amphibians, such as the midwife toad and the three varieties of newts that exist in the region.With regard to the Costa Quebrada sector, certified as a Global Geopark by UNESCO in 2025, it consists of a stretch of coastline that reaches Mogro estuary. It is not only breathtakingly scenic, but also a veritable open-air laboratory where you can see geology in action. It is also a habitat for valuable colonies of seabirds.