Chateau de Chillon is a must see place; no surprise it is ranked #2 of 16 attractions in Montreux on tripadvisor.
Tip: With the Riviera Card the admission fee is CHF6 instead of the adult price CHF12. I did not know about this as this rate is not displayed at the castle’s entrance, I found out only when I read later about the discounts you can get with this Riviera Card.
Wikipedia says: According to the castle website, Chillon is listed as “Switzerland’s most visited historic monument”
However, Wikipedia is not the ultimate truth and as I am curious (too curious I might add) I wanted to check for myself this statement. And I could not find it on the castle’s website.
So I went to the myswitzerland.com the ‘Official website of Switzerland Tourism’ and they say: Chillon Castle is located on a rock on the banks of Lake Geneva. The water castle is the most visited historic building in Switzerland.
So if an official website say so it is true.