The Guardiaregia-Campochiaro WWF Oasis is recognized as a Regional Reserve and protects spectacular karst landscapes , such as the canyon of the Quirino stream, the San Nicola waterfall, the caves of Pozzo della Neve and Cul di Bove which are among the deepest abysses in Europe. The Oasis is located within a Special Conservation Area in the Municipalities of Guardiaregia and Campochiaro (CB). It is also a Special Protection Area. Covering 3,135 hectares , it is one of the largest and wildest oases managed by the WWF.