i had pictures of the lower area of the falls that is more impressive than this...but luck be have it...i cannot find one single shot!! go figure! if you ever go there, make sure you are in relatively good health...the trail is a bugger bear to get down there and even more fun going back up.
Nice shot! I've been to those falls... astounding, aren't they? I like the tone you acheived, but I'd personally like to see a little more contrast. Try running a print that has almost "over the top" contrast then sepia toning. Just for hoots, ya know!