The Perito Moreno Glacier is a glacier located in the Los Glaciares National Park in southwest Santa Cruz Province, Argentina. It is one of the most important tourist attractions in the Argentinian Patagonia. The tourists can view the glacier from a small boat. Lucky visitors also could witness huge chunks of ice breaking from the glacier, falling into Lake Argentino. The Perito Moreno Glacier is one of only three Patagonian glaciers that is growing while most of the glaciers around the world are retreating, but the mysterious reason still puzzles climatologists.