Within Rossville is Sandy Ground, among the oldest surviving communities in the United States founded by free African Americans prior to the American Civil War, with the first documented land purchase by an African American in the area dating to 1828, just months after the abolition of slavery in New York State. Several of the community's historic structures are still extant, including five that have been designated as New York City landmarks, including a church, a cemetery, and three homes. Some residents also live in the original community.