Marsh-Billings-Rockefeller National Historical Park is a United States National Historical Park in Woodstock, Vermont. The park preserves the site where Frederick Billings established a managed forest and a progressive dairy farm. The name honors Billings and the other owners of the property: George Perkins Marsh, Mary Montagu Billings French, Laurance Rockefeller, and Mary French Rockefeller. The Rockefellers transferred the property to the federal government in 1992. It is the only unit of the United States National Park System in Vermont .