Discover the world's tallest geyser, North America's smallest bird, and the country's best shade tree on these three treks.
See glowing plankton, mushrooms, and bugs on these brilliant adventures.
Head to Northern California's Redwood National Park for a glimpse at these giants.
Backcountry crooks ransack public lands, stealing the natural prizes most coveted by collectors–and vulnerable species and hikers alike suffer when these icons vanish from the trails to resurface on the black market.
Sure, you know the mantra "leaves of three, let it be." But that warning alone doesn't help you detect those irritating plants that change colors, grow as vines, or mimic harmless species. Heed these tips to keep your summer itch-free.
More potent poison ivy is on the way, plus fast-growing weeds that will change the face of Eastern forests.
Beat the itchy stuff with creams or homeopathic measures.
The wooly bear caterpillar, wild leek, and yew have "magical" qualities, but live in your backyard.
Where's the best western foliage?
Rangers despise him. The law is after him. Yet in chopping down trees in an overgrown national park, Bob Garrison has become a hero to some hikers.