Most of the inhabitants of Caso live in the Nalón Valley, on which the largest town is the capital El Campu. The town is divided in two neighbourhoods: L'Arrobiu and El Barru.
In the past, most of Caso's people worked in coal mining and livestock farming. Nowadays, tourism has become one of the more important activities in Caso, but farming is still the most relevant.
The municipality is located in a wild and mountainous area in which there are plenty of hiking routes and natural places to visit:
Arrudos Defile, in Caleao.
Deboyu Cave, in Campo de Caso.
Tabayón del Mongayu (waterfall), in Tarna.
Brañagallones (shepherd's huts in the mountain), in Bezanes. Very nice prairie, surrounded by mounts where there are several old huts and a mountain lodge.
There is also some old churches and interesting civil constructions.
Pandu Quarter (traditional asturian architecture), in Campo de Caso.
