Boone Hall Plantation is one of the best-known plantation visits around Charleston, with a long oak avenue, a preserved plantation house, gardens, and grounds that draw many day visitors from the city. It is polished and popular, so expect a more packaged experience than at some smaller historic sites.
The strongest reason to go is to understand plantation landscapes at full scale: the approach road, the working land, and the surviving structures together show how wealth and slavery shaped the Lowcountry. Pair it with McLeod Plantation if you want a fuller and more serious picture.