I have several shots of this waterfall, Hraunfoss, from very different perspectives as we flew around it. It is truly a paralizing task to try to choose one, as they all have something very special and particular to it.
This one is not perfectly framed, but I think it's the one I like the most. The water comes from the porous lava field, and sheds directly into the river.
Exif: ISO 320 ; f/2.8 ;1/1000 ; @55mm