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
Plan your own trip with our Adventure Guide to Peru's Camino Salcantay >>
See the feature story "Machu Picchu the Cool Way" in the November 2007 issue of National Geographic Adventure.
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