In small caves at Arantza
The earth seen from the inside, led by an experienced guide. It is incredible to think that there may be another world under our feet, where water has opened up huge galleries and formed fantastic limestone formations.
A place where total darkness still exists, and where we will be able to listen to almost prehistoric sounds. The activity lasts for 3 ½ hours, 2 of them in the cave.
You need to wear clothes that can get dirty (quilted anoraks are not recommended) and comfortable clim-bing shoes. There is a short 4-metre passage in a gallery and a 3-metre rope climb. Maximum group size: 8 people (not recommended for children under the age of 10).
For people with experience.