Through an easy route of about 2km you will discover the hidden treasures of this beautiful town. The Episcopio (old bishop’s seat and later the bishop’s residence), the church of Santa Maria delle Grazie (with no façade, has the entrance curiously located on the right side of the building, in the middle of three large trachytic and limestone arches ), the Castle (built by the Genoese family of the Doria family in the 12th century, on the top of the Castelsardo promontory that dominates the inlet, with walls and the whole structure well preserved), the Cathedral of Sant’Antonio Abate and the Torre di Frigiano (which stands in its thirteen meters of height as a defensive outpost in the marina.