On my left upper arm/shoulder, about an inch and a half tall. That's the only one I have for now.
I'd considered having Taughannock Falls done on my back -- my WHOLE back... The crest of the falls between my shoulder blades, with the rising cliffs on either side across my shoulders, the falls themselves down my spine, and the amphitheater on either side of my spine with plunge pool and a bit of the stream on my lower back, ending just above my butt. I've even gone so far as to pick out a bunch of photos for an artist to work from (most of them from the parking lot overlook.) There's one artist in Cleveland who I would trust to do a fantastic job if I ever get the $$ and time to do it.