Tree climbing in Atlanta is number 9! There's a photo with this description at the Related Stories/Photos link:
"Vacation Land: The Great Outdoors
Tree climbing in Atlanta, Ga. is an off-beat way to experience nature's majesty. Tree Climbers International is a group of people who love to climb trees. They offer classes on how to scale trees using rope. The group was founded by Peter "Treeman" Jenkins, a retired rock and mountain climber and certified arborist.
(Peter Jenkins/Tree Climbers International)"