The Sociedade Portuguesa de Espeleologia (SPE) is a Portuguese nonprofit association dedicated to scientific, cultural, educational, and environmental work related to caves and karst landscapes. Based in Lisbon, it brings together members interested in exploring and understanding the underground world and its natural and cultural significance.

SPE’s activities include cave exploration, surveying and cataloguing, underwater exploration, and expeditions. It also offers training through its education department, including introductory caving courses that develop participants’ knowledge and skills for visiting caves under the guidance of qualified team leaders. Outreach initiatives share information about speleology, geology, caves, and karst environments with wider audiences. The association also works on environmental matters, publishes opinions and resources, and maintains a library and publications program.

Alongside its ongoing projects and educational activities, SPE organizes visits to karst regions in Portugal, introducing participants to caves, springs, and distinctive geological formations. Through these services and initiatives, the association supports responsible exploration, learning, and awareness of subterranean environments.