Dark clouds hang dramatically in the sky, contrasting with soaring white cliffs streaked with deep blue and rising high above a turquoise lake. The smell of ice hangs in the air, as does the creaking, rolling sound of ice on the move. Occasionally that sound rises to a crashing boom as huge chunks break off and hit the lake’s surface.
Image: Jakub Polomski
This is Argentina’s Perito Moreno glacier, remarkable both because it is the world’s third largest source of freshwater, and because — despite global warming — it is still growing. One of 48 glaciers fed by the Southern Patagonian Ice Field, Perito Moreno is currently about 197 feet (60 m) high and 3 miles (5 km) wide.