Torre Alba, coastal defence tower in Terrasini, Italy

Torre Alba is a coastal tower in Terrasini situated on a red marl cliff, featuring a square base and crenellated terrace supported by corbels. The structure overlooks the Lungomare Peppino Impastato waterfront and offers views across the coast from its upper levels.

Tiburzio Spannocchi's 1578 survey found no tower here; Camillo Camilliani planned a round one in 1586, but the finished tower, recorded as complete in 1589, has a square base. Three men served there in 1594 under Carini's supervision, and it was garrisoned in 1619, 1714, 1717 and 1797. In 1867 it was listed among fortifications to be decommissioned.

Locally the tower is also called Torre di Cala Rossa, after the red marl cove beside it. For years it was given for use, together with the building facing it, to a convent of nuns; after the 2006-2007 restoration the property passed to public ownership.

The tower stands between Cala Rossa and Cala Bianca, in the Terrasini municipality, and is reached by the coastal road linking the two bays. The door opens on the south side and has no external stair, so the interior is not entered from ground level. Restoration work carried out from 2000 to 2007 left the structure in good condition.

The tower's cistern is intact and was not pierced at its base, unlike those of other towers that were vandalised. The door opens to the south with a full-arch vault and has no staircase, and the windows, unusually, are only on three sides, the east side having none.