Since the site was found in the 1980s, archaeologists, engineers and cavers have continued to discover the vast range of tunnels and passages that make up this ancient mine.
Ers canfod y safle yn y 1980au, mae archeolegwyr, peirianwyr ac ogofwyr wedi parhau i ddarganfod yr amrywiaeth eang o dwneli a choridorau sy'n gwneud y mwynglawdd hynafol hwn.