Nestled in southwest China's Sichuan Province, Long Lake emerges as a crown jewel of Jiuzhaigou Valley – a UNESCO World Heritage Site renowned for its ethereal landscapes. At 3,100 meters above sea level, this serpentine body of water holds dual distinctions as the highest-altitude and longest lake in the region, its cobalt waters reflecting the Min Mountains' eternal snows like a polished celestial mirror.
The Eternal Treasure Gourd
Known locally as the 'treasure gourd that never fills nor drains,' Long Lake's Tibetan name hints at its hydrological marvel. Fed exclusively by glacial meltwater through limestone fissures, the lake maintains perfect equilibrium – its water level remains constant despite seasonal changes, a phenomenon that continues to intrigue geologists.
Geological Symphony
The lake's vivid coloration results from a unique combination of mineral-rich waters and calcium carbonate deposits. This natural filtration system creates water clarity exceeding 20 meters, allowing sunlight to refract into mesmerizing azure hues. The surrounding karst formations, shaped over millennia, form natural dams that sustain the lake's delicate ecosystem.
Ecological Keystone
As the primary water source for Jiuzhaigou's network of lakes and waterfalls, Long Lake plays a vital role in maintaining the region's biodiversity. Conservationists note its waters support rare species like the Sichuan golden snub-nosed monkey and numerous endemic fish varieties.
