Not too much of an explanation needed here.  I believe this waterfall is Skógafoss, which we hit on our way back to the city from Jökulsárlón.  We were pretty road weary, but we kept on trekking to get the trip complete.  Officially,  Skógafoss waterfall is a width of 82 feet and a drop of 200 ft.  I can’t say this photo gives the grandeur the justice it deserves.

Canon 7D | Canon EF-S 17-55mm f/2.8 | | 44 mm | f/4.0 | 1/125th | ISO100