There is a monument at the Oakwood Historic Slave Cemetery that tells of the slaves buried on the property. The slaves were viewed as sub-human, so they were placed in graves with no headstones or makers of any kind. There is no way to know who is buried here or even the exact number of people buried on this land.
We all know the horrible existence of many slaves. They were traded like cattle, beaten by their owners, and had less rights than my dogs do today.
I like to go to the cemetery from time to time. It helps me remember the past and what can happen when we start judging people based on their race, religion, ethnic group, sexual orientation, or anything else that may make that person different from us.