Voyageur means traveler in French, and Voyageurs National Park calls to travelers of the adventurous sort. The landscape here is breathtaking: Water makes up more than one-third of the park's 218,000 acres, and for most of the year, the park's interior is accessible only by boat (or in winter, by snowmobile). Rent a houseboat, take a boat tour with a park ranger, or hike on more than 27 miles of scenic trails, and keep an eye out for hidden waterfalls and ancient petroglyphs.