One of my best experiences when I was from travel through South America was the cruise that I stuck for him Amazon on board Fernandes II.
The boat started from Tabatinga, a small Brazilian population bordering Colombia and Peru.
Curious cross-shaped form Tabatinga (Brazil), Santa Rosa (Peru) and Leticia (Colombia) of which another day I will talk in more detail. I will only tell you that, being there, I was able to have breakfast in Peru, transfer by canoe to Colombia at lunchtime, and walk to Brazil to enjoy a fantastic dinner. All in one day.
As I said, boats depart daily from Tabatinga to Manaus, impressive city that is in the very heart of the Amazon jungle.
The trip normally lasts three days and two nights, time you spend mostly enjoying the landscape, talking with the locals with whom you share the trip, or lying in the hammock that you can buy for a small fee at any of the multiple stores you find in Tabatinga.
There is the possibility of spending the nights in one of the private cabins found on the boat, but if you decide on that option the price will skyrocket a bit.
I personally recommend that you buy a hammock and enjoy the breeze, the stars, and the mysterious sounds of the Amazonian night.
Without a doubt, this Amazon cruise was one of the best adventures that I keep in the memory of my unforgettable one year trip around the world.