I know four people who have been to curtain falls once. Years ago after trips we'd always get together for baked trout and a slideshow and play name that spot. For some reason Curtain for me, and I expect them, remains amazingly memorable. It's no longer possible but I'd be willing to bet all four could still name that spot if they saw yesterday's and today's POD. I've learned to recognize a few other spots I've never even been to via pictures on the web but Curtain remains as THE most recognizable BW/Q place I've been to once or twice. I don't know what it is but there is just something unmistakable about it in any water level although it looks nastier in low.