Charleston on the Atlantic Coast of the USA32.7N 79.9W
Charleston is a city in Charleston County, in the U.S. state of South Carolina.The city of Charleston is located just south of the mid-point of South Carolina’s coastline, at the confluence of the Ashley and Cooper Rivers (visible here by the shoreline near the right edge).
According to the United States Census Bureau, the city has a total area of 347.5 square kilometers (134.2 sq mi). 251.2 km2 (97.0 sq mi) of it is land and 44.3 km2 (17.1 sq mi) (15%) of it is water. The old city is located on a peninsula at the point where, as Charlestonians say, “The Ashley and the Cooper Rivers come together to form the Atlantic Ocean.”
The entire peninsula is very low, some of it is landfill material, and as such, it frequently floods during heavy rains, storm surges and unusually high tides. The tidal rivers (Wando, Cooper, Stono, and Ashley) are evidence of a submergent or drowned coastline. In other words, the original rivers had a lower base line, but as the ocean rose or the land sank, the landform was changed. There is a submerged river delta off the mouth of the harbor, and the rivers are deep, affording a good location for a port.