Question: Number of historic sites at  Antebellum Plantation and Farmyard museum?
About the article "Stone Mountain", section "Places of interest".

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Confederate Hall, operated directly by the Stone Mountain Memorial Association or SMMA, is a museum that educates students and park guests on the geology and ecology of Stone Mountain as well as historical aspects of the area.
A small theater shows a historical documentary about the Civil War in Georgia called "The Battle for Georgia".
The education department is host to thousands of students each school year teaching the subjects of geology, ecology, and history.
Classes are designed to meet the Georgia Performance Standards and the North American Association for Environmental Education guidelines.
The Antebellum Plantation and Farmyard is an open air museum composed of 19 historic buildings, built between 1790 and 1875, which have been re-erected to the site to represent a pre-Civil War Georgia plantation.
The historic houses have been furnished with an extensive collection of period furniture and decorations.
The farm features live animals that guests can pet.
A 732-bell carillon that originated at the 1964 New York World's Fair, provides a daily concert.
A covered bridge, dating from 1892, which originally spanned the Oconee River in Athens, Georgia.
A grist mill, dating from 1869 and moved to the park in 1965.
Museums and historical sites.
Casper is home to a number of museums and historical sites:  Fort Caspar Museum and Historic Site.
National Historic Trails Interpretive Center, a federally funded and operated museum  Nicolaysen Art Museum  Tate Geological Museum at Casper College  Werner Wildlife Museum  
The Woodlawn Historic and Archeological District encompasses a historic plantation near the Rappahannock River in southern King George County, Virginia.
The property is located east of US Route 301 near Port Conway.
The estate boundaries are essentially the same as those when the plantation was first established in 1790.
The main plantation house dates to that time although it has been extended and altered over the intervening centuries.
Also of notable interest on this property are surviving antebellum slave quarters, and archaeological sites containing evidence of Native American occupation of the land.
The plantation was listed on the National Register of Historic Places in 1991. 
Washington (originally called Heard's Fort) is a city in Wilkes County, Georgia, United States.
The population was 4,295 at the 2000 census.
The city is the county seat of Wilkes County.
The city is often referred to as Washington-Wilkes by locals, distinguishing it from any other Washington in the United States.
Washington has a number of restored antebellum, Victorian, and colonial homes along the narrow, tree-lined streets.
Washington claims to have more antebellum homes per capita than any other city of its size in Georgia .
Several sites in Washington are on the National Register of Historic Places including the Wilkes County Courthouse, the Robert Toombs State Historic Site, and the Mary Willis Library, known for its Victorian architecture and original Tiffany stained glass windows, and for being the first free public library in the state.
Also on the list are The Washington-Wilkes Historical Museum [http://www.kudcom.com/www/att02.html], and the recently restored Fitzpatrick Hotel built in 1899. 
The Myrtles Plantation is an antebellum plantation in St. Francisville, Louisiana, near Baton Rouge.
Listed on the National Register of Historic Places.
The plantation is rumored to be on top of an ancient Tunica Indian burial ground.
It is currently a bed and breakfast, and offers historical and mystery tours.