If you go to Lucerne, you cannot miss this bridge! First of all, it connects one part of the city to another. And it's one way to get to Old Town. By itself, though, it's a wonderful destination.
As you stroll along the bridge be sure to take your time and look up into the rafters where you'll see many old (and restored) paintings depicting Lucerne's history.
An informative board tells the history of the bridge before you cross it. There's also a little souvenir shop. Go early and it will be less crowded.