When we crested that last ridge and came onto this perfect glacial lake, the lake of Humantay, I thought: there must be a decent picture here, let's try not to screw it up! You can see where the meltwater comes pouring in on that waterfall--it's a bittersweet beauty because only a few years ago everything down to the edge of the lake was glacier.
—Photographer Brent Stirton
See the feature story "Machu Picchu the Cool Way" in the November 2007 issue of National Geographic Adventure.
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