Perito Moreno - Los Glaciares National Park, Santa Cruz Province, Argentina (Patagonia): The Perito Moreno Glaciar is one of only three Patagonian glaciers that are actually growing. It is said to be the size of Buenos Aires (approx. 97 sq mi). You can't, in this photo - nor in real life, see the end of this massive field of glacial ice. It cracks and bangs as it moves out into Lago Argentino. Pieces fall from it's face into the water, the sound can sometimes be felt -- on occasion, the low, bassy sound actually vibrates your core as it breaks away. It's an incredible site to behold.