Elberton is known as the "Granite Capital of the World." Elberton's more than 45 quarries produce more granite monuments than any other area in the world. In addition to mineral resources, Elbert County is rich in water resources. The Broad River forms the county's western and southern border. The county's eastern border with South Carolina is formed by the Savannah River, which has been dammed to create Lake Richard B. Russell and the Clark Hill Reservoir. Elbert County is home to the Richard B. Russell and Bobby Brown State Parks, located on the fork of the Broad and Savannah Rivers at the Clark Hill Reservoir. Several notable persons spent time in Elbert County. Nancy Morgan Hart and Stephen Heard, both heroes of the Revolutionary War, lived in Elbert County. Hart (for whom the neighboring county is named) served as a spy for Elijah Clarke and once captured six Tories who came to her home demanding food. Heard established a fort in Georgia in 1773, fought with Elijah Clarke at the Battle of Kettle Creek, and served as President of the Executive Council of Georgia for a short period.