Please note: Unfortunately it has been converted into a show cave since 2009 and is therefore no longer freely accessible!
One of the great classics in the Mejannes-Le-Clap area. 48m entrance shaft. After the first 20 meters you abseil freely into the 200m-diameter hall. Fantastic! The hall consists partly of huge (old) sinter. The plate / palm sinter is particularly beautiful. The floor is also adorned with some broken sinter columns.