On a knoll just by the seaside it is possible to visit one of the watch-towers that Charles V ordered to build in the Sixteenth century on the Adriatic coast in order to keep under observation the Turks' incursions.Other similar towers;which were part of the same defensive system;are situated in the near-by towns of Giulianova;Alba Adriatica;and Martinsicuro;where the tower was also used to control the border of the reign;marked by the river Tronto.The Cerrano Tower;entirely made up of brick;has a square base;scarp walls and corbels and is surmounted by another smaller tower;built later.