Cave explorers have found a third underground lake in the Kifisos River, measuring 60 meters in length, located near Peristeri. This phenomenon, caused by the erosion of construction materials, has raised alarms about potential risks to the structural integrity of the National Road above. Experts emphasize the urgent need for groundwater pumping and reinforcement of the riverbed to prevent possible subsidence, especially amidst increasing climate change-related flooding risks.

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