From Quenza you must take the D 420 road towards Serra-di-Scopamène: the bridge of Passava is not too far away. You can park your car just before or after the bridge but be careful not to obstruct traffic, in particular during the summer season.
To reach your destination, you must take the path which starts just before the bridge, on the left bank. Walk along the stream for about two or three minutes: you will have no problem finding your way because you could see the natural pools from the bridge. You should not suffer from the heat because there are some trees and because you could take a swim to cool off. Be careful if you have children because the stream is sometimes impetuous. Furthermore, you should wear a good pair of shoes to avoid slipping.
If you love fishing then you should know that this stream hosts diverse variety of fish species, in particular a lot of trout. You should walk up the river until you find a quiet spot where you can fish in peace and quiet!
If you still have some time at your disposal then you should visit the village of Quenza. This village has an interesting architectural heritage such as the Florentine castle (built at the beginning of the 20th century by Sebastien Colonna Cesari, Consul General in Florence), the Romanesque chapel of St Mary (whose apse and a part of the north wall date back to the 10th century and whose apse vault is covered with frescoes dating back to the 15th century) and the parish church of St George (whose bell tower and sacristy are classified as historical monuments).