📷 I posted a phone shot of this before, but this is from the camera. Where the Buenavista and Agrio streams join to form the RÃo Celeste (Sky-Blue River). I'll post the Wikipedia explanation in a comment, for those interested. #photography#CostaRica
"When these two streams mix to form Celeste River, the drop in pH causes the aluminosilicate particles to aggregate and enlarge to a diameter of about 566 nm. These suspended particles produce Mie scattering which gives the river a strong turquoise color." Wikipedia
"Buenavista River carries a large concentration of aluminosilicate particles with a small diameter. Sour Creek, as its name implies, has a high acidity due to volcanic activity." (continued)