| A | B |
|---|
| ATLANTIC OCEAN | THE HIGHWAY FOR EARLY EXPLORERS, SETTLERS AND IMMIGRANTS |
| OHIO RIVER | GATEWAY TO THE WEST |
| GREAT LAKES | INLAND PORT CITIES GREW ALONG THESE LAKES |
| MISSISSIPPI AND MISSOURI RIVERS | TRANSPORTATION ARTERIES FOR FARM AND INDUSTRIAL PRODUCTS |
| COLORADO RIVER | RIVER EXPLORED BY THE SPANISH |
| COLUMBIA RIVER | RIVER EXPLORED BY LEWIS AND CLARKE |
| RIO GRANDE | RIVER FORMS THE BORDER WITH MEXICO |
| GULF OF MEXICO | FRENCH AND SPANISH CROSSED THIS BODY OF WATER TO EXPLORE MEXICO AND OTHER PARTS OF AMERICA |
