Monte Fitz Roy stands in Los Glaciares National Park, part of the Southern Patagonian Ice Field, on December 2, 2015 in Santa Cruz Province, Argentina. #

Monte Fitz Roy, right, in Los Glaciares National Park on December 2, 2015. #

The Spegazzini glacier, in Los Glaciares National Park, on November 28, 2015. #

The Spegazzini glacier (left) and Heim glacier, part of the Southern Patagonian Ice Field, on November 28, 2015. #

Spegazzini glacier empties into Lago Argentino, in Los Glaciares National Park on November 28, 2015. #

Ice calves from the face of Perito Moreno Glacier on November 27, 2015, in Santa Cruz Province, Argentina. #

The jagged surface of Perito Moreno Glacier, photographed on November 27, 2015. #

Ice calves from Perito Moreno Glacier in Los Glaciares National Park on November 27, 2015. #

Monte Fitz Roy stands in Los Glaciares National Park on December 1, 2015, in Santa Cruz Province, Argentina. #

Horses stand outside Los Glaciares National Park in Santa Cruz Province, Argentina, on November 27, 2015. #

A river with glacial runoff flows outside Los Glaciares National Park on December 1, 2015. #

An iceberg broken off from a melting glacier floats in Lago Argentino, which holds runoff water from the Southern Patagonian Ice Field, on November 28, 2015. #

Perito Moreno Glacier stands above Lago Argentino on November 27, 2015. #

A man poses for a friend with his jacket blowing in the wind, in front of Perito Moreno Glacier in Los Glaciares National Park, on November 30, 2015. #

Melted glacial ice floats in Los Glaciares National Park on November 29, 2015. #

People view Perito Moreno Glacier from a platform on November 27, 2015. #

People hike on Perito Moreno Glacier, part of the Southern Patagonian Ice Field, on November 30, 2015, in Santa Cruz Province, Argentina. #