Mammoth Hot Springs Terraces, Yellowstone 2011
(1 in a multiple picutue set)
These beautiful terraces, formed by evaporating mineral-laden water, have formed into travertine. Yes, the same stuff people insist on putting into their bathrooms and kitchens. Imagine how much money a tile merchant could make from Mammouth Hot Springs.
I had been to Yellowstone fifty years before and it was remarkable how much large these formations had grown.