The Ferriere Valley is a State Natural Reserve where there is a special microclimate that hosts vegetation of mixed forests of alder and hornbeam. From Palazzo Lauritano reach the General Avitabile square in the hamlet San Lazzaro. From here take Miramare street and after 50m turn left and follow Radicosa street following the CAI signs. Follow the signs toward Mount Murillo; here the road climbs into the woods with the stairs in limestone rock, among the terraces and chestnut woods. After the climb go straight on the ridge and at the first fork, keep right. The trail continue on the flat and downhill through the Santa Croce valley. Following the CAI signs you reach a stony ground where flows the Acqualella spring. Along the way you can see the ruins of the old ironworks from which the name of the valley and the ancient paper mills.With a length of about 10km and a difference of altitude of about 150m uphill and 800m downhill, it takes about 4 hours to reach the natural reserve, and another hour to reach the city of Amalfi. Driving time: 4 hours.