4. Three Castles, Defensive Wall and Ramparts of the Medieval Market-Town of Bellinzone This site is an outstanding example of a late medieval defensive structure guarding a key strategic Alpine pass. It consists of fortifications grouped around the castle of Castelgrande, which stands on a rocky peak looking out over the entire Ticino valley. running from the castle, a series of fortified walls protect the ancient town and block the passage through the valley. A second castle, Montebello, forms an integral part of the fortifications, while a third one, Sasso Corbaro, stands alone on an isolated rocky promontory. Together, they formed the southern bastion of the alpine valleys. Web; www.bellinzonaunesco.ch