The St. Croix National Scenic Riverway is one of those special places in nature that doesn’t have an optimal season; whenever you choose to go, is a good time to go.

Overlooking the Knife River not far from its confluence with the Missouri, Knife River Indian Villages National Historic Site today preserves vestiges of what 200 years ago was the heart of Northern Plains tribal trade.

Tucked far north in Montana, hard against the Canadian border, Glacier National Park is a rumpled and craggy masterpiece. Within the park’s 1 million acres rise rustling aspen glades, stands of an unusual evergreen—larch—that loses its needles in winter, even a temperate rainforest of Pacific red cedars, hemlocks and Pacific yew. This is the kingdom of grizzlies and wolves, wolverines and lynx, species that for many exist only in books, magazines, and nature documentaries.

The Harry S. Truman National Historic Site must be one of the most entertaining historic places in the National Park System. It shows Harry and Bess' life before and after his presidency.