Slender white trunks reaching skyward and leaves fluttering even in the gentlest breeze—aspens are a symbol of the American wilderness. These trees are the most widespread native species in North America, with Pando, located in Utah"s Fishlake National Forest, being a massive quaking aspen grove. Their fall foliage is breathtaking, with their leaves turning a vibrant yellow that lights up the landscape, as seen in today"s photo, which was taken near Marble, Colorado.