brazil, santarem, meeting of the waters, santarem river, amazon river
Off the edge of Santarem the murky (brownish-yellow) waters of the Amazon River meet the aquamarine waters of the Tapajos River.
For some distance (after joining together) the different colored river waters don't mix and there's a very visible dividing line.
The locals call this the "Meeting of the Waters," and it's a very unique phenomenon.