The Aral Sea was once full of life; it is now desiccated, stark, barren. One of history's worst environmental disasters is now a tourist attraction. What can it teach us about the fate of humankind? Henry Wismayer tells the cautionary tale of Uzbekistan's Aral Sea, once the world's 4th largest inland body of water, as a cautionary tale of complete human disaster. A similar scenario is playing out in Utah's Great Salt Lake.