Wild Australia - The Edge, filmed on the doorstep of Australia's largest city, is about an ancient wilderness ... a labyrinth of lost worlds and magical places - beautiful and treacherous waterfalls, canyons and underground rivers, carved by streams that lead back into a world as it was ninety million years ago. In a remote ravine, 40 ancient trees survive unchanged from the age of the dinosaurs. Rappel into this world of exotic creatures and unique plant life with our modern bushwhackers.