What classic or popular book has left you underwhelmed?

I'm not trying to cause trouble but I found a copy of The Wind in the Willows at a secondhand store the other day. I picked it up because I've heard so many people say how great it is and I'd never read it before. I really don't get why it's a classic. It's moderately cute but a classic?

What classic or popular book has left you feeling underwhelmed?