Guggenheim

Follow the SP14 from Martinetto for 7km until you reach the Scola restaurant, and turn right towards the village of Oresine. The approach path starts 1km up the hill at a sharp right bend where a stream goes under the road. There are several parking opportunities a few hundred metres before this, or afterwards in the village of Oresine. From the road bend, follow the path that goes uphill over the stream and leads leftwards to the right hand side of the Muro buttress. 5 minutes from the road. The grotta is two minutes further. To reach the Rettilario sector  continue in the same direction for a few minutes and go up past a fixed rope.