| Answer | Crossword Clue |
|---|---|
| ORINOCO | River that forms part of Colombia's border |
| UBANGI | River that forms part of Congo's border |
| NEISSE | River that forms part of the border between Germany and Poland |
| OHIO | State, or river that forms its southern border |
| ONTARIO | The Detroit River forms part of its border |
| IOWA | The Big Sioux River forms part of its border |
| PERU | The Putumayo River forms part of its northern border |
