Explore one of Costa Rica’s most famous natural wonders where you can observe one of nature’s most intriguing phenomena. Two brooks merge together, turning clear water into a divine hue of turquoise. This chemical reaction, due to the volcanic minerals, makes for an astounding sight that can only be experienced at this unique location! Rio Celeste (light blue waterfall) Rainforest is located at Upala in Tenorio National Park. This is a prime area for birdwatchers. Birds that inhabit the park include tody motmots, bare-necked umbrella birds, sunbitterns, trogons, toucans, toucanets, crested guans, woodpeckers, hummingbirds and much more. Mammals that inhabit the park include pumas, jaguars, margays, ocelots, tapirs, tayras, howler, spider, capuchin monkeys, sloths, and many more. There are many amphibians including blue jeans, dart frogs, red-eyed leaf frogs, and smoky jungle frogs.