Krasny Klyuch, Karst spring in Nurimanov District, Russia
Krasny Klyuch is a karst spring in Nurimanov District that discharges large volumes of water continuously, fed by two connected sinkholes with considerable depth. The spring forms an open pool from which water constantly surges and flows into a natural stream.
In the early 1900s, the spring powered one of Russia's first hydroelectric installations, which supplied energy to an industrial factory nearby. This project demonstrated how the region harnessed natural resources for industrial production early on.
The spring's name refers to the reddish tones visible in the water, though the actual color shifts between white and blue depending on mineral content and light. Visitors notice these subtle color variations as they walk along the water's edge throughout the day.
The water maintains a consistently cold temperature year-round, making it especially refreshing on warm days when you visit. The site is accessible and features well-trodden paths along the water that invite exploration.
The water originates from an underground river that travels many kilometers beneath the surface through limestone passages before emerging here. This hidden journey makes the spring a window into a subterranean aquatic world.
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