The Tower of the Scafa was a watchtower manned by two men of which there is evidence as early as 1598.
It is also known as the Tower of the Fourth Royalty because under the government of the Spanish Crown, and until 1954, a tax corresponding to the fourth part of the catch was levied there, first in the form of payment in kind and later through a monetary consideration.
The structure severely damaged by a sea storm in November of the year 1898, was later rebuilt with considerable remodeling and adjustments.
It originally had a truncated cone shape similar in size to other coeval towers found in the Gulf of Cagliari.
The present form is cylindrical with reinforced concrete slabs to carve out two small rooms on which some windows were inserted for lighting.
A helicoidal staircase connects the two levels of the tower and provides access to the terrace.
A brick frieze is visible on the upper part of the facade.
The overall height of the tower exceeds 8 meters with a diameter of 4.4 meters.
The building, owned by the Autonomous Region of Sardinia, underwent a recent restoration completed in late 2017 by the Regional Coastal Conservancy Agency.