Thomas Marent / Cascades of the Iguacu Falls, the world's largest waterfalls, Iguacu National Park, Argentina

Colin Monteath / East Face of Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Cerro Torre and Fitzroy reflected in small pond at dawn, Loma Plieque Tumbado, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Hiker, Cerro Torre and Fitzroy reflected in small pond at dawn, Loma Plieque Tumbado, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Glacier tumbling down from granite peaks, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Fitzroy Massif with sunrise glow on high granite spires, Los Glaciares National Park, Argentina

Tui De Roy / Perito Moreno Glacier actively advancing into Lake Argentina, Los Glaciares National Park, Argentina

Flip Nicklin / Southern Right Whale (Eubalaena australis) underwater portrait, Argentina

Robert Fulton / Aerial view of glacier near Lago Argentino, Argentina

Konrad Wothe / Ushuaia, Southernmost city of Argentina, Beagle-Channel, Tierra del Fuego, Argentina, South America

Konrad Wothe / Cascades of the Iguacu Falls, the world's largest waterfalls, Iguacu National Park, border of Brazil and Argentina

Konrad Wothe / Cascades of the Iguacu Falls, the world's largest waterfalls, with rainbow, Iguacu National Park, border of Brazil and Argentina

Bryan and Cherry Alexander / Shipwreck in the harbour at Ushuaia, Argentina, 2009.

Bryan and Cherry Alexander / Museo del 'Fin del Mundo' (The Museum of the End of the World). Ushuaia, Argentina, October 2006.

Bryan and Cherry Alexander / Waterfront in Ushuaia with the Govenor's house by a small jetty. Argentina, October 2006.

Bryan and Cherry Alexander / Walkers descending along the trail between Antarctic Beech and Bahia Lapataia, Tierra del Fuego National Park, Argentina, October 2006.

Bryan and Cherry Alexander / Boardwalks along the shore at Bahia Lapataia, Tierra del Fuego National Park. Argentina, October 2006.

Bryan and Cherry Alexander / Museo Yamana, the museum to the indigenous indians of the Beagle Channel region. Ushuaia, Argentina, October 2006.

Bryan and Cherry Alexander / Plaza Gendarmeria Nacional along the shore in Ushuaia, Argentina, October 2006.

Bryan and Cherry Alexander / War Memorial to the war in the Falklands, along the shore in Ushuaia, Argentina, October 2006.

Bryan and Cherry Alexander / Memorial to the sinking of the Belgrano during the Falklands War in 1982. Ushuaia. Argentina, October 2006.

Bryan and Cherry Alexander / Dramatic skies over the Memorial to the sinking of the Belgrano during the Falklands War in 1982. Ushuaia. Argentina, October 2006.

Bryan and Cherry Alexander / The memorial to the war in the Falklands or Malvinas, along the shore in Ushuaia, Argentina, October 2006.

Bryan and Cherry Alexander / Mural of Emperor penguins descending stairs on a pavement in Ushuaia, Argentina, February 2009.

Bryan and Cherry Alexander / Woman selling knitwear made from Alpaca wool in a craft market close to the harbour. Ushuaia, Antarctica, February 2009.

Bryan and Cherry Alexander / The bust of Adrien de Gerlache, Belgian Polar Explorer, on the seafront at Ushuaia. Argentina, February 2009.

Bryan and Cherry Alexander / Plaque below the bust of polar explorer Adrien de Gerlache, on the seafront at Ushuaia, Argentina, 2009.

Bryan and Cherry Alexander / Modern statue to the Mapuche saint, Manuel Pie de Piedra, by Ellero Jose. Ushuaia, Argentina, 2009. For editorial use only.

Colin Monteath / Perito Moreno Glacier front, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Wind warning sign and high wind clouds, Patagonia, Argentina

Colin Monteath / Magellanic Woodpecker (Campephilus magellanicus) male on route sign to Laguna Torre under Cerro Torre peak, Los Glaciares National Park, Patagonia, Argentina

Flip Nicklin / Southern Right Whale (Eubalaena australis) calf spyhopping near tourist boat, Valdez, Argentina

Mark Moffett / Argentine Ant (Linepithema humile) grabbing the leg of a fire ant in a fight to control the dead grasshopper they are standing on, the fire ant is exuding venom from her stinger used to slash her atta...

Mark Moffett / Argentine Ant (Linepithema humile) group on barbed wire, Argentina

Albert Lleal / Monk Parakeet (Myiopsitta monachus) feather, Argentina

Stephen Belcher / Southern Beech (Nothofagus sp) trees shaped by wind, Patagonia, Argentina

Heike Odermatt / Mimosa (Mimosa spegazzinii) flowers, Argentinia

Thomas Marent / Cascades of the Iguacu Falls, the world's largest waterfalls, Iguacu National Park, Argentina

Ingrid Visser / Patagonian Mara (Dolichotis patagonum), a rodent which looks like a cross between a rabbit and a deer, Punta Norte, Peninsula Valdes, Patagonia, Argentina

Albert Lleal / Ornate Horned Frog (Ceratophrys ornata) skin, Argentina

Theo Allofs / Moon over Cerro Fitzroy, Los Glaciares National Park, Argentina

Theo Allofs / High granite spires, Lago de los Tres and Cerro Fitzroy, Los Glaciares National Park, Argentina

Colin Monteath / Fitz Roy seen from Marconi Pass, Los Glaciares National Park, Patagonia, Argentina and Chile border

Colin Monteath / West Face of Cerro Torre, Los Glaciares National Park, Patagonia, Argentina and Chile border

Colin Monteath / East Face of Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / East Face of Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / West Face of Cerro Torre, Los Glaciares National Park, Patagonia, Argentina and Chile border

Colin Monteath / Mount Fitzroy and Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Mount Fitzroy and Cerro Torre landscape, Los Glaciares National Park, Patagonia, Argentina

Theo Allofs / Mount Fitzroy massif, border of Argentina and Chile

Theo Allofs / Creek with Mount Fitzroy in background, border of Argentina and Chile

Theo Allofs / Andean forest on steep cliff, Argentina

Theo Allofs / Mount Fitzroy Range under dramatic clouds at sunset, Argentina

Theo Allofs / River flowing through deep valley near El Chalten, Argentina

Theo Allofs / Southern Beech (Nothofagus sp) near Mount Fitzroy, Argentina

Theo Allofs / El Tatio Geyser Field at 4,200 meters above mean sea level, Argentina

Theo Allofs / El Tatio Geyser Field at 4,200 meters above mean sea level, Argentina

Theo Allofs / Sinter terrace at El Tatio Geyser Field at 4,200 meters above sea level, Argentina

Theo Allofs / Moon over mountain range at sunrise, with Cerro Torre and Fitzroy, Los Glaciares National Park, Argentina

Theo Allofs / South American Sea Lion (Otaria flavescens) in shallow water, sunset, March, Valdes Penisnsula, Patagonia, Argentina

Theo Allofs / South American Sea Lion (Otaria flavescens) with pups on beach, March, Valdes Penisnsula, Patagonia, Argentina

Colin Monteath / Fitzroy Massif reflection in lake at dawn near Poincenot camp, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Cerro Torre and Fitzroy, dawn from Loma Pelique Tumbado, Los Glaciares National Park, Patagonia, Argentina

Patricio Robles Gil / Bay at low tide, Tierra del Fuego, Patagonia, Argentina

Colin Monteath / Mount Fitzroy landscape, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Cerro Torre, centre, and Mount FitzRoy, right, Cerro Solo, left, at dawn famous peaks on edge of Patagonian icecap, Los Glaciares National Park, Patagonia, Argentina

RHONDA KLEVANSKY / Coastal scenery with beach and ocean cliffs, Rio Negro Province, Southern Argentina

Miles Barton / Aerial view of Iguazu Falls on the Argentina / Brazil border, South America

RHONDA KLEVANSKY / Petrified tree trunks, Monumento Bosques Petrificados, Patagonia, Argentina

RHONDA KLEVANSKY / Perito Moreno glacier with low cloud, near Calafate, Patagonia, Southern Argentina

Tui De Roy / Glacier and alluvial fan, Nahuel Huapi National Park, Tronador, Patagonia, Argentina

Colin Monteath / Cerro Torre, left, and Fitzroy seen from Loma Pelique Tumbado, with evident terminal moraine, Los Glaciares National Park, Patagonia, Argentina

Winfried Wisniewski / South American Gray Fox (Lycalopex griseus) walking over bare ground, Patagonia, Argentina

Colin Monteath / Antarctic cruise ships in Ushuaia Harbor, summer, Tierra del Fuego, Argentina

Colin Monteath / Lenga Beech (Nothofagus pumilio) in fall colors and Cerro Torre, at 10,280 feet elevation, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Hiker on Loma Plieque Tumbado admiring the view of Cerro Torre, left, and Fitzroy, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Hiker on Loma Plieque Tumbado admiring the view of Cerro Torre, left, and Fitzroy, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Camp beside small pond below Fitzroy, autumn, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Lenga Beech (Nothofagus pumilio) trees and Mount Fitzroy in autumn, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Mt Fitzroy and Poincenot at dawn, Los Glaciares National Park, Patagonian Andes, Argentina

Colin Monteath / Cerro Torre seen from Agostini camp, Los Glaciares National Park, Patagonian Andes, Argentina

Colin Monteath / Cerro Torre, a famous rock and ice spire, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Windstorm over ocean in Beagle Channel, Tierra del Fuego, Argentina

Colin Monteath / Mt Fitzroy reflected in lake at dawn, Los Glaciares National Park, Patagonian Andes, Argentina

Colin Monteath / Mt Fitzroy reflected in lake at dawn, Los Glaciares National Park, Patagonian Andes, Argentina

Konrad Wothe / Lesser Rhea (Rhea pennata) pair, Patagonia, Argentina

Konrad Wothe / Guanaco (Lama guanicoe) mother and young, Patagonia, Argentina

Tui De Roy / Perito Moreno Glacier, tourist overlook at base of glacier, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Perito Moreno Glacier with heavily crevassed fast, flowing ice surface, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Perito Moreno Glacier with heavily crevassed fast flowing ice surface, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Granite spires buffeted by storm clouds, Fitzroy Massif, Los Glaciares National Park, Argentina

Tui De Roy / Glacier off Mt Tronador, Nahuel Huapi National Park, Patagonia, Argentina

Tui De Roy / Glacier off Mt Tronador, Nahuel Huapi National Park, Patagonia, Argentina

Tui De Roy / Southern Beech (Nothofagus sp) forest and Petit Moreno Glacier dropping into Lago Argentino, Los Glaciares National Park, Argentina

Tui De Roy / Patagonian Mara (Dolichotis patagonum) feeding on desert vegetation, Camarones, Patagonia, Argentina

Tui De Roy / Guanaco (Lama guanicoe) family group in sparse coastal Patagonian steppe habitat, Valdes Peninsula, Patagonia, Argentina