The Dirillo, or Acate, is a 54-kilometre (34 mi) river in Sicily which springs from the Hyblaean Mountains and flows through the areas of Vizzini, Licodia Eubea, Mazzarrone, Chiaramonte Gulfi, Acate, Vittoria, Gela.

[2] Pliny the Elder makes the same connection in his Naturalis Historia[3] Agate and chalcedony can still be found here.

During the period of Arab rule it became known as Wadi‑Ikrilu: ‘The River of Acrille’, an ancient Greek-Roman colony that stood in the surroundings.

In the 1950s, the Azienda Nazionale Idrogenazione Combustibili dammed the river near Licodia Eubea to create Lago Dirillo, a reservoir for the Polo petrolchimico di Gela petrochemical plants.

With good fishing and camping facilities, as well its natural scenery, this area has become a tourist attraction.