The name Giara, Sa Jara, probably derives from the Latin glarea (gravel), with reference to the widespread stoniness that characterizes the plateau surface.
The Pliocene basalt plateau of the Giara (500-600 m a.s.l.) surrounded by 11 municipalities, spreads to about 45 square kilometres of territory.
Steep dark lava rock cliffs, with its sometimes impetuous little waterfalls occasionally appearing, surround this vast plateau. Its surprisingly flat top is embellished with suggestive water stagnation Pauli (Tramatzu Pauli, Pauli Maiori, etc.) with their beautiful, glistening spring water buttercups blooms.
With its remarkable landscape and naturalistic value, the Giara has been included among the nine national parks established by Regional Law No. 31 of 1989