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Here's an ideal itinerary for 3 days in Manaus:
I hope this itinerary helps you make the most of your time in Manaus!
The Meeting of the Waters boat tour in Manaus takes you on a scenic journey where the dark Rio Negro and the sandy-colored Amazon River meet but flow side by side without mixing for several miles. You'll also get to see the local flora and fauna, including pink river dolphins and giant water lilies.