The cabin area is now a historic preservation and archaeological dig site . African-Americans , both enslaved and free , built the city of Charleston . Nicodemus , South Carolina , is oldest surviving African-American town west of the Charleston . Kansas , in Kansas , was a safe haven for freed people the 21st century .
African-Americans , both enslaved and free , built the city of Charleston . Nicodemus , South Carolina , is oldest surviving African-American town west of the Charleston . Kansas , in Kansas , was a safe haven for freed people the 21st century .