The
Casiquiare river is a
distributary of the upper
Orinoco flowing southward into the
Rio Negro, in
Venezuela, South America. As such, it forms a unique natural canal between the Orinoco and
Amazon river systems. It is the world's largest river of the kind that links two major river systems, a so-called
bifurcation. The area forms a
water divide, more dramatically at regional flood stage.