This cave was hidden beheath the earth 's surface until May 1975, when it was discovered by chance during drillin a well Later, scientific studies were carried out, and its antiquity was dated at about three million years. The same sources indicate that the minerals to be found there are iron, magnesium, sodium and calcite.

The temperature and humidity inside the cave remain constant throughout the year, and external oscillations are hardly appreciable in its interior. The temperature is about 20º and humidity is never less than 80%. The naturally corrugated form of the walls adopts fancitul patterns, and it isn't difficult to imagine a human face, the figure of a sleeping animal..: In the roof, the hanging roots of the plants growing outside contribute to create a still more fan atmosphere.