Lynn has ranked high among English seaports from early times.
The coast of Sardinia contains few seaports, but a good proportion of these are excellent natural harbours.
It was one of the five seaports which remained Byzantine until the time of Pippin.
When the two lowlands are traced eastward they become confluent after the Niagara limestone has faded away in central New York, and the single lowland is continued under the name of Mohawk Valley, an east-west longitudinal depression that has been eroded on a belt of relatively weak strata between the resistant crystalline rocks of the Adirondacks on the north and the northern escarpment of the Appalachian plateau (Catskills-Helderbergs) on the south; forming a pathway of great historic and economic importance between the Atlantic seaports and the interior.
On the whole, however, France is inadequately provided with natural harbours; her long tract of coast washed by the Atlantic and the Bay of Biscay has sqarcely three or four good seaports, and those on the southern shore of the Channel form a striking contrast to the spacious maritime inlets on theEnglish side.