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Driving from Masua to Buggerru you'll find a sign indicating Cala Domestica. Well just 450 metres before that, on the right side (inland) there is a dirt road winding through the valley. Follow the road for 2.2 km, until a widening where the river has destroyed the road. From here follow the path going up and walk inside the gorge.
As the gorge gets narrower, after 10 minutes of walking, you'll find on your right-hand side the sector Istentales. After a few more minutes, just over a ford, you'll find the sector Piazza Pulita.
Keep on walking 600 metres, passing by a scree to your left (sector Accabbadora at the top), and finally, just by the road, you'll be at the base of Marangigio