Forming a part of the Cantabrian mountains this is a popular area for people interested in not only wildlife but also earth sciences such as geology and paleontology. Geological interest points, as well as the Global Geosite, in the valley of the Luna River are well worth the visit.
The Trilobite Deposit and Paleozoic Series in Los Barrios de Luna.
The Angular mismatch between Precambrian and Cambrian in Irede de Luna and Portilla de Luna.
The Arcos de Agua and Peña Cefera Glacier-Periglacial Complex in Murias de Paredes.
The Boeza Glacier Valley in Murias de Paredes and Igueña.
The Limestone faults in Mallo de Luna.
The River Capture and Glacio-Lacustrine Deposit in Puerto de La Magdalena.
The Carboniferous Continental Deposit in Valdesmario.