Shenandoah National Park, Virginia
Since Shenandoah's more than 300 square miles of parkland are so heavily forested, it's a gorgeous place to be when the seasons change. Look for oak and chestnut trees, which are abundant in the park, as well as splashes of autumn pigment from sassafras, sumac, and poison ivy. (Yes, poison ivy leaves change color in the fall. Just don't get too close.)
When to Go: Take a peek at the park's Mountain View Webcam for a real-time look at the changing leaves. Expect the best colors in mid-October in more elevated parts of the park and late October to early November in more low-lying areas.