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Marble Caves, Patagonia A gorgeous set of caves that are a unique natural wonder, Marble Caves in Patagonia are among the most beautiful places in the world that you won't find anywhere else. Get close up by kayaking through the caves and caverns and see the marbles in their purest form, polished only by the lapping of the lake over millions of years. Afterwards, you can explore the majestic San Rafael Glacier and the Exploradores Glacier, two other attractions of this region.