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The Perito Moreno Glacier is located in Los Glaciares National Park and is one of the most popular tourist destinations in the Argentinean Patagonia. It is the third-largest reservoir of fresh water in the world. Due to warm temperatures, over the past 50 years many of the glaciers in Los Glaciares have been shrinking. However, the Perito Moreno Glacier is one of the three Patagonian glaciers that are actually growing!