The Frederick Douglass National Historic Site preserves and interprets Cedar Hill, where Frederick Douglass lived from 1877 until his death in 1895.
The centerpiece of the site is the historic house, which sits on top of a 51-foot hill and is surrounded by eight acres of the original estate. Restored to its 1895 appearance, the house is furnished with original objects that belonged to Frederick Douglass.
A typical visit lasts about 1.5 hours. Things to do include touring the historic house, looking at exhibits, watching the film, and walking the grounds.
Source: Basic Information – Frederick Douglass National Historic Site (U.S. National Park Service)