It's of a large waterfall (something in the Niagara class, not one of these charming mountain rivulets), or of what may be SEVERAL waterfalls. Ideally, in fact, it would be three waterfalls coming down into a circular or semicircular basin, one on the left, one center, one on the right, sort of as a confluence of three rivers happening right at the waterfall drop cliff. It could be one of a single waterfall that happens to be wide enough that it's pouring down three sides of such a basin. The shot should be from the lower river level (i.e., in a boat coming upstream looking at the central fall or point of the fall), or at least from the air BELOW the level of the falls rather than shot from the side or above.
I've done a few searches and failed to find what I was looking for.