Lush, cool, damp forest?
Are you talking a temperate rain forest?
Those exist only in Washington State, British Columbia, and I believe Norway -- basically, it's terrain where ocean currents blow into tall mountains and dump rain.  It's the terrain you see a LOT on Stargate SG1, and in the 13th Warrior.
Flora: Douglas firs (up to 200 ft. tall evergreen trees), ferns, blackberry brambles (not native, but very common), occassional deciduous trees like birch, lots of moss.
Fauna: Mountain lions, black bears, deer, racoons, squirrels, coyotes, various raptor birds.
Someone mentioned Eastern PA . . . I can vouch for the northern Appalachians (Taconics in Pa/NJ/NY/CT, Berkshires in MA, Green Mountains in Vermont) being relatively similar terrain to hike through, though significantly drier -- far fewer gurgling streams and less moss and lichen.  The major differences are more mountain laurel (5-15' tall thick bushes), eastern hemlock instead of douglas fir, and a lot more deciduous trees in the mix -- maple, oak, and tulip are common, in addition to occassional birch and willow.  In the old days, there used to be lots of chesnuts (killed by a blight in the 20th century), and blackberries are common, as are ferns and some edible grasses and ground nuts.  Fauna wise, there's a lot more foxes, and I think wolves were more prevalent before they were exterminated, taking the top ecological niche of mountain lions in the Western, wetter terrain.