Been there/done that
Maunaus is the kick off point for Amazon cruises. Large town established by Portugese when rubber plantations thrived in 1800's - some Brit ****** stole a rubber seed and planted it in Malaya.....over 100 rubber merchants commited suicide in one night - see headstones in graveyard....has only opera house in Jungle...Portugese brought in Opera companies from Portugal...one complete company died of Malaria....Concord has landed at Maunaus International...area also has special Brazilian tax status as duty free port...Eiffel [tower fame] built The "Floating Dock ''
Portugese used to send dirty washing back to Portugal as they considered Amazon water too muddy.
Any more you need to know....
Oh Yes the Palace Hotel for best whores in town....
Hope that Britania have better luck than Portugese