The Meeting of Waters in Manaus, Brazil consists of the Rio Negro (Black River) and Rio Solimões. Both are tributaries of the much larger Amazon River. The two rivers flow together, side by side, for nearly four miles, at which point the properties that keep them separate begin to dissipate, and allow the sandy, silty Rio Solimões blend with the black water of the Rio Negro. Together, they form the Amazon River. Meeting of Waters a major tourist attraction, drawing tens of thousands of people to it every year. If you visit Brazil, make sure to add Meeting of Waters to your list of things to see.