The Portuguese Speleological Society (SPE) is the pioneer of organized Speleology in Portugal since 1948, and conducts explorations and studies of caves throughout the country. The Portuguese Speleological Society embraces the largest number of specialists in Speleology in Portugal and attempts to divulge its action to the public by keeping it informed and at the same time to find new vocations. The structure of The Portuguese Speleological Society is based upon Delegations, which are represented in the National Directorate and in the National Congress. Small groups of members may also form Nucleus.

The competence of The Portuguese Speleological Society is nationally and internationally recognized, and therefore it is often requested by public and private entities to conduct studies or provide specialized advice on their areas of action. The pioneering work of The Portuguese Speleological Society on inventories, characterization and distribution of surface and underground karstic phenomena was the basis for the creation of the Serras de Aire and Candeeiros Natural Park.