10 Mysterious Places on Earth Where Water Vanishes

10. Sinks Canyon: Wyoming's Subterranean River Mystery

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In Wyoming’s Sinks Canyon, the Middle Fork of the Popo Agie River plunges into a limestone cavern called The Sinks, travels unseen for hours, and resurfaces a quarter-mile downstream at The Rise. Dye tests reveal a slow, winding subterranean route through karst passages. This hidden journey shapes local groundwater, supports specialized cave life, and offers visitors a dramatic glimpse into the unseen plumbing that sculpts much of the American West.