Cool off with these stunning shots of one of nature's most dramatic forces.
Hydrology's usually a bit of a dry subject. But when the study of water's movement across Earth helps us understand how waterfalls work, it becomes very dramatic indeed.
GODAFOSS, ICELAND
Icy conditions made this shot a challenge: "Water spray was constantly refreezing to my lens, so I had to frequently wipe it down," says photographer Ed Graham.
KIRKJUFELLSFOSS, ICELAND
"The night left a thin layer of snow over the highest mountains [in] fresh air that is difficult to have in our cities," describes photographer Alessandro Mari. Here, the runoff from Iceland's most photographed mountain forms a waterfall.
BY RACHEL BROWN
Reference: National Geographic
