If you drive over a bridge near Holland, Mich., and walk a few hundred feet, you'll wind up face-to-face with a giant, centuries old windmill. So what's the big deal about this one? Well, this structure – the historic DeZwaan – is the only authentic, working Dutch windmill in the United States. It arrived here from the Netherlands in the 1960s, the last windmill to ever leave the country. And today, it is still running.