About 4km south of Uta, you'll see the fairytale image of castle ruins atop an extraordinary craggy mount. These belong to the Castello di Acquafredda, a 13th-century castle that served as a temporary hideout for Guelfo della Gherardesca when his father Ugolino, the reviled ruler of Iglesias, was imprisoned in Pisa and the family banished. Nowadays, little more than the castle walls remain.
