A small island of granite rock that probably owes its name to its long, sinuous shape. Serpentara is four kilometres off the beaches of Villasimius, in whose territory it falls. The 134 hectare area is uninhabited, populated by wild rabbits among lush and scented Mediterranean brush, along with herons, Corsican gulls and shags who nest here. It is common to spot dolphins along its coasts.
In the northern part are the Variglioni, large granite rocks that form natural swimming pools in the sea, perfect for taking a dip. At the southern end of the island are yellow, grey and pink granite masses sculpted by the wind. The island's easiest access point is Calettad'Approdo, to the north-west.