Between Rondinaio and Tre Potenze Mountains, in the territory of Bagni di Lucca (to be more specific, in Val Fegana) there’s the Orrido di Botri Protected Area that contains a calcareous canyon which is a deep, narrow rocky gulch, with steep cliffs carved by the cold waters of Mariana and Ribellino rivers (that form the Rio Pelago when they meet).
There you'll find a beautiful stratification of different kinds of greenery: the higher you go the warmer it is, so it changes from moss and fern to columbine plants. The sides of the canyon reach 200 meters and are the ideal place for golden eagle nests.
In the summertime, when the flow rate is smaller and the temperature is warmer, you can climb from Ponte a Gaio to the Piscina.
If you want to reach the falls of this canyon, first you need to get to Borgo a Mozzano along the Brennero road and before you get to Bagni di Lucca, in the village Chifenti, turn left towards Garfagnana and then turn right after a few kilometers, following the direction of Tereglio. Go straight for about twenty kilometers and then follow the road sign indicating Ponte e Gaio – Orrido di Botri.