The Tre Fiumi area is a rugged and wild basin at about 750 meters above sea level affected by quarries and ravaneti, in particular by the spectacular quarry, now abandoned, called “le Tagliate”, which still carries the Henraux sign at the entrance. The type of quarry is a rare example of a mining site with a rock curtain crossed by a large helical wire cut. In the area some of the service buildings of the marble excavation activity are still preserved. The Tre Fiumi area was home to the block loading and marble measurement terminal of the Alta Versilia marble railway, active from 1923 to 1947 and “loader hillock” of many of the quarries of the Anonima S.Henraux company in the area of Arni. The town owes its name to the confluence of three river branches of the Canale del Freddone and Tùrrite Secca.
