Paddle steamer lake Luzern  

Lake Luzern steamboat

You can really test your skill as a photo detective on this double image of a steamer near Flüelen on Lake Luzern, Switzerand, because the amount of detail in the picture makes the task of finding a single difference difficult. These boats are popular in summer, when taking a lake cruise is an attractive choice; in winter far fewer boats run and the cold weather tends to discourage tourists, even though the scenery is just as spectacular.