Manaus is also famous for its rivers.
Imagine, the Rio Negro is slightly warmer than the Amazon river. when they converge, they don’t mix straight away. Instead there is a sort of dance aside in a distance of 4 Kilometres. It is just impressive from the sky or from the surface.
That’s not it. The rivers connect the deepest part of the Amazon region to the rest of the world. This means commerce of everything will find a route here. Between exchange of goods as big as a delivery of boats to transport even more workers or tourists, this region grows exponentially.
When you talk about growth, you also talk about it in terms of prices so for a European traveler it’s still fine but I let you imagine the consequences on the local life.