Dettifoss must be one of Iceland’s most spectacular sights. It brings to mind both Niagara Falls and the Grand Canyon yet is nearly tourist-free and certainly no admission charges. In terms of volume, it is the largest waterfall in Europe.
As with other waterfalls in Iceland you can happily walk around in the calmer waters at the top with no barriers or signs. I really hope the growing tourist population doesn’t result in the Healthy & Safety overkill I see in many other places.
Dettifoss is well worth the detour, although the road would be pretty bumpy if not in a 4×4. Of if you’re feeling lazy, you can also see it in the opening sequence of the recent film Prometheus.