Travel Stories 7 Extraordinary Eco-Friendly Vacations Hiker on the Emerald Lake Trail in Rocky Mountain National Park Hiker on the Emerald Lake Trail in Rocky Mountain National Park Share this Facebook Icon Twitter Icon Email Icon Join National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Join National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Photo: Getty Images