May 13, 2026
A Rio Negro cruise: monkeys, piranhas, sloths, dolphins, and snakes.
Our tour of South America next took us to Brazil; specifically – to the city of Manaus (after a few adventures in São Paulo). But Manaus was just our base. The attraction was something a lot bigger and a lot more famous (just noticed – its Wikipedia page comes in a full 200 languages; rarely see that!). Have you guessed it yet? Yes, it’s the Amazon – the world’s largest (by both water volume and drainage basin) and arguably the longest river in the world!
Actually, we were more generally exploring Amazonia, aka the Amazon Basin, aka the Amazonian Plain, aka the Amazon Lowlands. And specifically – one of the Amazon’s main tributaries: the Rio Negro. Why? Because in these parts the Amazon is very silty and murky, and so there’s not much to see or do there. The Rio Negro on the other hand has much cleaner water and contains fish and dolphins and more, the surrounding ecosystem is richer, and indigenous people live along it in the jungle.
I say cleaner; here’s proof: the meeting of the muddy Amazon and the cleaner Rio Negro:

If you zoom in you can see it better:

And this mixing of clean and muddy water goes on for dozens of kilometers downstream from where the rivers meet. Here’s the confluence on Google Maps.
So where to begin? With the jungle, the indigenous people, and the rest of the locals? Local customs? Grottoes in the rain lit with shafts of sunlight?…





















































