Available from January 2024.

Includes: Guide + Helmets + Frontal light

Duration: 2 hours

Distance: 1.2km

Minimum age: 6 years

Observations: Bring water, sun protection, wear sporty clothes and shoes
Where does the activity take place: meeting point

Please park in the visitor centre parking lot.

In 1949 the ashes of the San Juan volcano buried parts of the best agriculture land in the area. It generated an extend land in which an exceptional volcanic tube was formed. This tube is nearly 500 meters long, more or less 3 meters wide and between 1 and 6 meter high.

Its scientific interest consists mostly in the geological formations and its biological importance due to the adapted fauna found in the underground life.

General recomendations

• Wear comfortable clothing and suitable footwear, as well as a jacket and some rain protection if necessary.
• It is also advisable to bring sun protection and a cap or hat.
• Bring plenty of water.
• Never deviate from the marked paths.