Near Montreux, Chillon Castle is located on a rocky island on the banks of Lake Geneva. The site of regular exhibitions and cultural events, the castle is the most visited historic building in Switzerland. For nearly four centuries Chillon was both the residence and profitable toll station of the Counts of Savoy.

Every year, more than 400,000 guests visit Chillon, with its 14th-century wall paintings, subterranean vaults, parade halls and original bedroom dating to the time of Bernese rule. The entire complex consists of 25 buildings and three courtyards, protected by two circular walls.