At this point an unusually beautiful spectacle called the meeting of the waters occurs. The dark coffee - colored waters of the Negro River and the muddy waters of the Solimões meet and flow side by side without mixing for approximately six miles [10 km].
Vietā, kur satiekas Solimoinsa un Riunegru, ir vērojama krāšņa un neparasta aina — tumšie, kafijbrūnie Riunegru ūdeņi un gaišā, duļķainā Solimoinsa uzreiz nesajaucas, bet gandrīz desmit kilometru plūst vienā gultnē divās joslās.