Having attended Fort Caroline Elementary School in Jacksonville in the 1960s it comes as a bit of a surprise that the lost French fort built in 1564 wasn't built near Jacksonville as long thought but, according to researchers, was actually constructed 70 miles to the north on Rhetts Island at the mouth of the Altamaha River in Georgia.

Fort Caroline was the first fortified settlement in what is today the United States being built a year before the Spanish established St. Augustine and its location was determined after cross-referencing maps housed at France’s national library (the Bibliotheque Nationale de France) written in 16th century French, Spanish, Latin and English, with modern coastal charts from the National Oceanic and Atmospheric Administration, and maps published by the U.S. Geological Survey

The next step is to begin excavation at the site.

Further Reading:

Oldest fortified settlement ever found in North America? Location of Fort Caroline may be in Georgia

Fort Caroline Found? Oldest Fortified Settlement In North America May Be Located In Georgia

Oldest fortified settlement in North America discovered in Georgia