AB-6

On the NA 140, at the exit of the village of Abaurrea Alta, in the direction of Ochagavía/Otsagabia, take the track on the left, called Erdiko Bidea, and follow it until it joins medibarrengo Bidea without changing direction. Take the first fork to the left and then immediately take another fork to the left. Reach Marikoren Borda; the cavity is located on the slope of Ilkortea.