Inside the Parco Nazionale delle Foreste Casentinesi flows the river Rabbi whose waters flow for more than 60 km until it flows into the Montone river. Along its course, the Rabbi turns into an evocative whirlpool which has been given the name of "Grotta Urlante". The waterfall that is formed, is broken along a series of rocks and pours into a deep pool, here the water resounds to become a real big noise. The splendid pools that are created are three, wide and deep.
At a distance of about 1 km you come across the Cascata della Sega, a double waterfall, and in the rapid Seghina.