Gljúfrabúi waterfall in South Iceland is cool and all, but I don't think I'd like to revisit it. It was a pain in the butt to get in and out, it got us well drenched, and I bonked my head on the rough wall on the way out. It hurt for days! There is a photo of me grinning like an idiot while getting drenched by the waterfall, so it couldn't have been that bad?