Just outside of Montreux is the medieval castle Chateau de Chillon. It has existed in some form since the Bronze Age and has undergone many changes in the centuries since. It is an amazing setting on the bank of Lake Geneva with the Alps in the background.
It took us a good few hours to see everything in the castle. Some of the rooms are up extremely steep and narrow stairs and are not for the faint hearted. Afterwards we walked along the promenade back to Montreux. We were less than halfway along when I took this picture looking back to the castle.