Arauca Department
The southern boundary of Arauca is formed by the Casanare and Meta Rivers , separating Arauca from the departments of Casanare and Vichada . 
<triplet> Casanare <subj> Meta River <obj> mouth of the watercourse <triplet> Meta River <subj> Casanare <obj> tributary <triplet> Casanare <subj> Vichada <obj> shares border with <triplet> Vichada <subj> Casanare <obj> shares border with