It includes spaces of relatively small size with a high Interest, and its purpose is to protect ecosystems, communities or biological elements that due to their rarity, fragility, importance or uniqueness deserve special mention. Found here are, fundamentally, caves and estuaries with dune systems.

Asturias is a region that stands out for its numerous caves and grottoes, which are the setting for natural and cultural ecosystems that are utterly enchanting and of enormous interest to travelers eager for adventure and new sensations, surrounded by the purity of nature. The estuaries and dunes are also places of particular beauty where the wildlife characteristic of the area can be seen in all its splendour.

Ría de Ribadesella/Ribeseya

Ribadesella/Ribeseya Estuary.