CDS91, or the Comité Départemental de Spéléologie de l’Essonne, is a dedicated organization promoting caving (spéléologie) and canyoning activities within the Essonne region of France. The committee serves as a hub for both enthusiasts and newcomers, providing a wealth of resources, including event calendars, regular training sessions, and information on local clubs.

Offering an array of exciting activities, CDS91 organizes national caving and canyoning days, where participants can engage in workshops that include rope climbing, guided descents, and more. Events are designed to cater to everyone, from seasoned spelunkers to those with no prior experience—ensuring a fun and safe introduction to these thrilling outdoor pursuits.

Additionally, CDS91 emphasizes inclusivity through specialized programs, such as annual canyoning outings for visually impaired individuals, showcasing their commitment to providing accessible adventure experiences. Whether through thrilling expeditions underground or along beautiful canyon landscapes, CDS91 invites all to explore the wonders of the natural world.