This is one of the most powerful waterfalls in the world - certainly it is awe inspiring. The course of the water has changed recently and you can walk around on what was previously the bed across which the water flowed.
They say that noone has ever gone over the falls and survived - and standing on the top next to the water going over the edge you can see why. The water falls into a chasm, the depth of which cannot be seen.
Oddly, we didn't quite appreciate the scale of the place when were there, it only became clear quite how large and powerful it is once we got home and saw these pictures.