Nature has created a dense hedge at the canyon's rim that serves as a very effective fence.

This photo was taken by a Hasselblad 500C medium format film camera with a Carl Zeiss Distagon 1:4 f=50mm lens and Hasselblad/63 1xHz-0 drop in filter using Fuji Pro 400-H film, the negative scanned by an Epson Perfection V600 and digitally rendered with Photoshop.