Yellowstone National Park Visit   July - August 2003
The spectacular travertine terraces of Mammoth Hot Springs

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Next to Old Faithful, I would think the terraces of Mammoth Hot Springs are the second most recognizable feature at Yellowstone.  These spectacular travertine terraces are ever changing, as they are formed by super-heated water which dissolves underground limestone that forms interlaced pools on the surface, one on top of another.  Aren't they wonderful?