The Rio Celeste in Costa Rica is a naturally neon blue river

This Neon Blue River Is Real and Spectacular

This Neon Blue River Is Real and Spectacular

Atlas Obscura
Your Guide to the World's Hidden Wonders
May 27 2014 12:25 PM

This Neon Blue River Is Real and Spectacular

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Tenorio Volcano National Park in Costa Rica is home to a river plagiarized from a fairy tale. The Rio Celeste is a turquoise wonder, turned neon by nature. It's all about the minerals, Marie: the river's blue hue results from a mixture of sulfur and calcium carbonate that comes from the nearby volcano.

It's a bit of a shlep to get to the Rio Celeste—you need to hike for an hour through the park. The further upstream you go, the brighter the blue becomes. You'll see a gorgeous waterfall and may spot a tapir or two along the trail. The ultimate destination is Los Teñideros: the spot where two clear rivers converge and the blue Rio Celeste appears as if by magic.

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A river runs through it: