With this official, i already have 6 different cards of the Chillon Castle.
CH-109510, sent by Rita.
The Château de Chillon (Chillon Castle) is located on the shore of Lake Geneva in the commune of Veytaux, at the eastern end of the lake, 3 km from Montreux, Switzerland. The castle consists of 100 independent buildings that were gradually connected to become the building as it stands now.
Chillon is currently open to the public for visits and tours. According to the castle website, Chillon is listed as "Switzerland's most visited historic monument". - in: wikipedia
More than 300,000 guests visit Chillon per year. They view the wall paintings from the 14th century, the subterranean vaults, parade halls and the bedroom (which has been preserved in its original form) dating to the time of Bernese rule. - in: http://www.myswitzerland.com/en/chateau-de-chillon-en-montreux.html