Charleston, South Carolina I've now been to Charleston twice to research my family's roots there. Although SO much information is available on line, when I travel to locations in my family's history I ALWAYS learn something new, or feel and experience something critically important in my journey. Charleston has a unique place in our country's history. It was the largest port of the Trans-Atlantic slave trade, with a total of between 100,000 and 200,000 people trafficked at it