Wow, elementary school history class finally pays off!
In Virginia, and to a lesser extent Pennsylvania, the geography of the Atlantic coastal region played a major role in the history of English settlement. The small sailing vessels of the English colonial effort were able to navigate the rivers in Virginia along the coastal plain, but were unable to pass the “Fall Line” into the interior.
This natural barrier determined the locations of the earliest colonies, and the later larger towns. The Piedmont region, featuring rolling hills and the gradual rise to the Appalachian Mountains were settled only by road travel. Roads were difficult to build in the densely forested regions beyond the coastal plain. While the settlement happened, it happened in small steps, and the communities created were highly isolated. This fostered a very strong sense of self-reliance, and was a very fertile environment for the same aspects of character that made independence a likely intellectual step later.
The rivers in Virginia are of little importance in travel now. The placement of the fall line is still evident, though, from the location of the oldest cities in the State. Richmond, Jamestown, Petersburg, Alexandria, and the Maryland port city of Georgetown, later to become a part of Washington, DC. The City of Baltimore is still a major port, due entirely to the protected waterway offered by the Chesapeake Bay. Norfolk, Suffolk, Newport News, Falmouth, and their naval yards are a direct inheritance of their obvious geographical benefits to a society dependent upon ship born trade.
The most obvious and easily seen example, of course, is the City of New York, New York. The entire earth has no more obvious port city location. Whoever settled the North American continent, the greatest port on that side of the continent would have been in the same place. With that port, the city there must necessarily become a finance center, and a city of world wide commercial significance.
San Francisco is in the same circumstance on the opposite coast, although the sheer size of the Pacific mitigates its importance until such time as the society is able to reliably negotiate such vast distances in a commercially useful manner. Seattle is much the same, although the matter of distance is even greater.
In the southeastern quarter of the US the matter of sea travel and river travel become overwhelming in importance. Without existing roads, walking among the many swamps and forests of the Pristine American continent would be tedious indeed. Placement of communities is almost entirely based on the availability of adequate harbors, and the military defense of same. Those cities that were established were far more closely connected to their sea trade partners than to the other colonies on the continent for the simple reason that road travel from Savannah to Richmond was at best an adventure involving significant discomfort, and real risk. The effect that isolation had would continue into the next century, and perhaps beyond.
Geography is part of history.
Tris