These photos don't do it justice. It's about 10x prettier than my photos can show. It's almost too pretty.
CS Lewis used to visit this area regularly, and supposedly this valley helped inspire his vision of Narnia. The park contains a cabin named "Narnia" owned by the Northern Ireland Cancer Fund for Children http://www.nicfc.com/how-we-can-help/activities-events/narnia-log-cabin/
For more info see http://www.leavesnbloom.com/2010/04/real-life-narnian-trail-memorial-to-cs.html. Her photos were taken after the leaves had fallen, giving a much brighter appearance to the trail.