Tucked away on a hillside in northern Westchester County, NY, Sylvan Glen Nature Preserve is the site of a former quarry which supplied a honey-colored granite for the Cathedral of Saint John the Divine in New York City. Some of the property was purchased in 1981 and was opened as a park when additional adjoining properties were acquired. Quarries of various sizes and remnents of the operations are located throughout the western portion of the park. Subsequent acquisition of adjacent land extended the park onto former farmland and provided another entrance to the park.