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【Strange but True】Why Does a River Have So Many Colors? Exploring Colombia’s Rainbow River

Published: 2026-09-25 👁 101 views
Last updated 2026-09-25 — The world is so vast that there are always many hidden wonders yet to be discovered. One of them is the “Rainbow River” (Cano Cristales) located in the suburbs of Bogotá, the capital of Colombia. Its riverbed boasts a spectrum of colors including yellow, green, blue, and black, with red being the most striking...

The world is so vast that there are always many hidden wonders yet to be discovered. One of them isColombiathe capitalBogotáin the suburbs, where there is a “Rainbow River” (Cano Cristales). Its riverbed features a variety of colors such as yellow, green, blue, and black, with red being the most prominent.

Why is this so? It turns out to be because of the algae in the riverbed. The bright red algae grow at different rates, creating a range of hues. When combined with the surrounding riverside vegetation and water tones, they form this unique visual spectacle.

Some foreign media have dubbed this river the "Liquid Rainbow." Thinking about it, let’s just call it the Rainbow River in Chinese. Spanning 100 kilometers in length, the best time to visit the Rainbow River is from late July to early December each year. However, getting to the Rainbow River is quite a hassle—you need to take a connecting flight from the capitalBogotáor the central city of Villavicencio, and visitors must join a local tour to access it. So, why not just stay home and enjoy our report instead?

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