The forest canopy over your head filters the light to a peridot green glow. The mist and droplets all around you shimmer like spilled diamonds. The trail underfoot is springy, and there is so much moss all around you that it softens the appearance of the landscape like a lens blur. You might spot elk or beavers as you wander among the trees in Washington state’s Olympic National Park’s Hoh Rain Forest, but you’ll half expect to see elves and fairies peeking out from behind the foliage in such a magical setting.