Hokkaido’s Biei Blue Pond. Why the blue colour? In 1988, nearby Mt. Tokachi erupted. To prevent the effect of volcanic mudflow on the town of Biei, a dam was constructed on Biei River. The Blue Lake is just one of a number of ponds that were born as a by-product of construction. Neat huh? #VisitJapanAU #JapanRevealed 📷: @kickupthefire
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