Caves with speleotherms
 

Can anyone help with an unusual request. I am looking for caves in the Sahara which have speleotherms (those things that hang from the ceilings of caves and also grow up from the bottom). Anywhere in the Sahara will be good - ideally we need several caves which come from a mix of wet and drier parts.

I know about a cave in Al Aweinat, Libya but none of the others.

many thanks!