2. Walden Pond, Massachusetts
Philosopher Henry David Thoreau lived in a one-room cabin on Walden Pond for two years, and his writings pioneered the conservationist movement. You may be inspired to take pen to paper yourself when your eyes take in the colorful foliage in autumn. Take a hike around the pond, visit a replica of his humble home, and soak in the scenic serenity. Thoreau was right – simple pleasures like this really do enrich the soul.