"Foss" is Icelandic for waterfall, and the country is full of them. These are some of the most spectacular. Note that you can walk right up the roaring water at most of these. No fences, rails, etc.
Godafoss, the most historical. The pagan idols were thrown here after Christianity butted in.
Dettifoss, the most powerful falls in Europe. (You can open this up to see the people on the left for scale.)
Skogafoss, the edge of the former shoreline.
Double-falling Gullfoss, on the Golden Circle. (Again, open to see people for scale.)
Style-monger at Dettifoss on a photoshoot of some kind (note weird animal figure in arms); a touch of Reykjavik style in the wild.