The Cyrus McCormick Farm and Workshop is on the family farm of inventor Cyrus Hall McCormick known as Walnut Grove. Cyrus Hall McCormick improved and patented the mechanical reaper, which eventually led to the creation of the combine harvester. The farm is near Steele's Tavern, Virginia and Raphine, Virginia, close to the northern border of Rockbridge County, Virginia and Augusta County, Virginia, and is currently a museum run by the Virginia Agricultural Experimental Station of Virginia Tech. The museum with free admission and covers 5 acres (2.0 ha) of the initial 532-acre (215.3 ha) farm.