Puglia's most striking tourist attraction - because it is so unique - is the trulli district, around Alberobello (a UNESCO World Heritage site). A trullo is a simple dry-stone-walled building with a domed roof topped by a cone. They are dotted around the green Valle d'Itria, and in Alberobello the town's large clusters of white-washed trulli create an unusual and memorable scene. Also striking, in a more sophisticated style, is Lecce, a town famed for its baroque beauty: all golden stone and elegant seventeenth-century architecture with riots of cherubs and foliage. On the whole, the smaller towns of Puglia, and the countryside, make better holiday destinations than the big port cities. Martina Franca, Locorotondo, Cisternino and Ostuni are all picturesque hilltop towns scattered around the Valle d'Itria. Along the coast, Otranto is one of the most attractive seaside resorts, with a picturesque old town and blue waters. Around Taranto there are fascinating underground sanctuaries and churches, while at Castellana Grotte, close to Alberobello, there are impressive natural caverns offering guided tours. The small Tremiti islands are busy destinations for daytrippers enjoying holidays on the wooded Gargano peninsula - a national park with rocky shores, and a popular holiday destination. The Salento area is another popular choice for summer holidays: it is the peninsula making up the lowest part of the heel of Italy's boot. Many Catholic pilgrims head for San Giovanni Rotondo, the site associated with Padre Pio - the bearded modern saint you'll see depicted on mountains of cheap religious kitsch all around Italy. Among other religious sites are the Church of St. Nicholas (Basilica di San Nicola) in Bari, where the remains of 'Santa Claus' (stolen from Turkey by the enterprising Baresi) lie in state in the crypt. For a different kind of pilgrimage, film lovers may be interested in a side-trip to Castellaneta, the birthplace of Rudolph Valentino. If you are touring with a car you'll be able to visit the intriguing castles of Frederick II, including the enigmatic octagonal Castel del Monte, another World Heritage site.