Patagonia’s Great Glaciers, especially those found close to El Calafate in Argentina, belong to the largest and the most breathtaking in the world. A one day cruise on Lago Argentina, in the National Park of the Glaciers, took me to the largest glacier of the Americas, Glacier Upsala, but also to several other stunning ones. But probably the most exciting part was Ice-trekking on Perito Moreno, also one of the largest glaciers in South America.