Attach a small nylon strap to your body, drive to a higher place, climb up a tall tree, attach a tiny strap to a steel wire and then coast down these wires (zip lines) for about 2 miles, from treetop to treetop, crossing over valleys hundreds of feet above the very tall trees in the process.

Awesome.. If it was just a walk through the treetops it would be great, but the added thrill of almost flying across valleys is incredible.