Rockwood Hall is a distinct section of Rockefeller State Park Preserve with commanding views of the Hudson River and Palisade Cliffs. Between 1886 and 1922, William Rockefeller’s estate was about 1000 acres with a 202-room mansion, a working farm, and a landscape designed by Frederick Law Olmsted. While the house and buildings are now gone, massive rock walls around the former house site and extensive grassy fields with magnificent specimen trees harken back to the heyday of the estate during the gilded age.