The river starts to change colour and becomes distinctly bluer as you get closer to the Matevulu Blue Hole.DAVID KIRKLAND ... Lou Lou is pushing through shoulder-deep water, long blonde locks ...

They were rolling in the deep. Scientists have identified what could potentially be the “deepest known blue hole” in the world, extending so far down that the bottom has not yet been reached.

As we navigate pit drops and slippery rock, we discover an incredible deep blue hole at the bottom of the cave. With a few surprises (including bats and cold water), this journey is a wild mix of ...

cientists have identified what could potentially be the "deepest known blue hole" in the world -- which extends so far down it's bottom has not yet been reached.