The Centre de Natura i Desenvolupament Sostenible dels Pirineus Les Planes de Son (Nature and Sustainable Development Centre of Les Planes de Son) is a facility that belongs to the Caixa Catalunya, and is managed by the Fundació Territori i Paisatge de l'Obra Social de Caixa Catalunya. The centre offers leisure stays in a natural setting and also educational courses related with the natural environment.

The philosophy behind Les Planes de Son stems from the desire of the Fundació Territori i Paisatge de Caixa Catalunya to make one of the best conserved and most attractive regions of the Pyrenees (Spain), including the Àneu valleys, available to the whole population. It is an ideal centre at which to spend a few days with family, friends or schoolmates and to enjoy a new way of experiencing and understanding nature. It offers unique, comfortable facilities with accommodation for 92 people, rooms with 2 to 4 beds, living room, cafe and dining room, kitchen, two rooms with computer equipment, laboratory, auditorium, play area, document centre, media centre and library, planetarium, astronomic observatory and Fauna Centre.

In order to make sure that no-one is excluded from this opportunity to enjoy nature in this wonderful setting, the Centre Les Planes de Son has been specially adapted to receive people with problems of reduced mobility, as have all of the facilities and the activities and programmes organised at the centre.