The age of these caves is estimated at 10 million years, but it was considered an important archaeological landmark in 1905 AD by speleologist Pedro Santandreu while he was excavating in search of one of the gems in it, and in 1910 the cave was illuminated even before the village of Porto was supplied Questo is powered by electricity, and there are three main caves in it: The Round Cave, the Blue Cave and the Traditional Cave, each of which has its own distinctive features.