Its discovery occurred unintentionally on the afternoon of the 24th of December 1963, when five kids wandering the hill known as Cerro Romperropas or Cerro del Águila (Hill of the Eagle in English), were surprised to see steam coming out of a hole. The steam was produced by the difference in temperature in the caves, about 17°C, and the cold weather outside.
Helped by ropes and lanterns, the boys ventured into what appeared to be an animal’s hole, just 60cm in diameter. They descended for a while and crawled through about 50 or 60 meters until they reached the great main gallery. Afterwards, they were lost inside the caves for almost five hours, until they finally found the hole they came in from.
Then came everything else, giving the news of the great discovery to the authorities, the owners of the farm, experts, etc. After hard work of conditioning and since July the 18th 1964, Cuevas del Águila (Caves of the Eagle in English) are open to the public every day of the year.