Friday, March 21 marks the inaugural World Glacier Day, an international observance established by the United Nations to raise awareness about the rapid retreat of glaciers worldwide.

The event, known as calving, is a normal occurrence ... just 500 meters (1,600 feet) from Perito Moreno, offering panoramic views of the glacier against the Andes. Many also embark on guided ...

At the southern tip of Glacier National Park in Southern Patagonia sits one of the region's most magnificent glaciers, Perito Moreno. Unlike 95 percent of Earth's glaciers that are gradually ...