Beautiful! I think this is one of the very few pinhole shots I really like. You've managed to make an often photographed area look original with a bit of mystery around it.
Love the contrast between the water and the vegetation. The vignette created also tapers in ones view to the falls. Nice capture, and than you for sharing. I sure do miss that region. -Doug
+1 to the others' comments. The way it darkens to the edges is great. What are the wispy highlights above the bridge? They look like ghosts - are they extra little splashes? They're very cool whatever they are.