Between Heaven and Earth

"I wanted to see the array of trunks that loomed over the creek, the dark side of Adventure, and I kicked off and traveled in that direction, getting closer to the goal in a series of gentle swings. I found myself in the middle of a Gothic tower of fusions, bridges, and spires, held up by flying buttresses. The zone was crisscrossed by branches, and the trunks ran out of sight in both directions, upward and downward. Overhead there was nothing but canopy. No sky, although when I looked down I could see a small patch of ground, starred with ferns. In front of me, at a height of 180 feet [55 metres], was a fire cave. It was called the Upper Fire Cave, and its mouth was plastered with dirt. The dirt was canopy soil. ...