From the crest of this reef, a narrowledge falls away over a distance of about 100 yards (91 m) until it reaches an average depth of between 55 and 65 feet (17 - 18 M) where the drop - off begins.
Here the boats stop and you can climb over a rock ledge to a stunning rock pool in the canyon where it's possible to take a dip in the cool turquoise water and swim further up the narrow river.