The Three Castles of Bellinzona are a group of fortification located around the town of Bellinzona in canton Ticino, Switzerland. The group is composed of Castelgrande, castle Montebello, castle Sasso Corbaro and fortified walls. The Castelgrande is located on a rocky peak overlooking the valley, with a series of fortified walls that protect the old city and connect to the Montebello. The third castle (Sasso Corbaro) is located on an isolated rocky promontory south-east of the other two The Three Castles of Bellinzona have been an UNESCO World Heritage Site since 2000.