We are the
Chelsea Spelaeological Society
Say hello to our new website!
We’ve been working hard on redesigning the website with an improved look, more features and much better support for mobile devices. We hope you like it.
Come caving with CSS
Most of our current members live across the South of England and South Wales where we have a cottage adjacent to the Mynydd Llangattock limestone massif. This has some of the longest and largest caves in the country with 65+ kms of explored passages.
See our current Events and Trips Calendar.
Visit our local caves
With world class caves right on our doorstep, each offering classic trips of varying length and complexity, there's plenty to keep both beginner and experienced cavers occupied.
Are you new to caving?
CSS welcomes new members, offering them the opportunity to make new friends and to learn new skills, exploring the underground world one cave at a time.
Stay at Whitewalls Cottage
Looking for a place to base your club's caving weekend in Wales? CSS hires out its warm, well-equipped cottage with up to 16 bunks available, kitchen, showers, changing area, garden with BBQ and camping pitches.