With Su Stampu e Pireddu are associated, on a local scale, a few legends about the name Pireddu. The best one tells the story of an outlaw, a bandit whose, after committing a few crimes, would hide in this cave. To make is name even more legendary, he would use these underground passages to escape: passing through underground lakes using a boat, he was able to reach Iglesias using these underground tunnels. Obviously professional exploration did not confirm these stories. It is more likely that Pireddu was a local bandit who was sentenced to death and thrown down this part of the cave.