Strong composition, Frank.

Leads your viewer's eyes right to the couple.


Caveats?

Made mention of this on-site tutorial to you in some other comments. Once again, and to make life easier for you, here is a link:

"Faking the HDR thing..."

The reason I make mention of it is that your exposure is lil' off.

Overexposed, that is and in short.

So.. to give you an idea of what playing around with the settings/technique contained in the linked tutorial can accomplish.. downloaded your image here and gave it a go myself.

Here are the results (hope you don't mind):

"A View from the Falls - Reworked" (Highlights/Shadows adjusted)

There was sufficient photographic data overall that via the technique/adjustments.. the overexposure was tamed for the most part. Save that of the larger white'ish rock in the right-hand side. Although, on this note.. sunny day.. one could expect this naturally and to a degree.

Again, just some creative/editing food for thought.

Frank, I really like this image, the people give it a super perspective, if you gave it some darkening by level adjustment, or perhaps using a program like topaz lens effect you would have brought out the beauty of this shot even more, in my humble opinion, it is a bit overexposed, but what a beautiful spot.
Tigs♥ =^..^=

A good perspective and lovely colours in the photo Frank. I'd have to agree with the others on the overexposure.