Waterfalls are captivating to look at and contemplate, and many of them are peaceful, but Gullfoss has a tremendous power to it. The waterfall roars and is audible from a long distance. The incredible volume of water spilling over those rocks generates billowing clouds of mist that, blown by the wind, sweep over everyone and everything. One of the challenges of photographing Gullfoss is just trying to stay out of the mist.
While Gullfoss is not a particularly high drop, it is nonetheless huge. This photo, showing two people out on a promontory overlooking the upper falls, gives a sense of scale. (And if you're thinking those two look awfully close to the edge of danger, you're right - in Iceland, you can always go right to the very edge.)