Imagine water so dazzling blue that when people see pictures of it, they usually accuse the photographers of digitally altering them. That's exactly the case with the waterfall in Rio Celeste, a river in Costa Rica's Tenorio Volcano National Park. If you're wondering why this river is so stunningly neon despite having #NoFilter, the answer may surprise you: it's a combination of volcanic minerals and bacteria.
What in the Blue Blazes?
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