Historic estate's 2.94 acre building lot now offered for sale! One of the few properties in New Castle County to be listed on the National Register of Historic Places, "Rock Spring" ownership records date back to an original land grant to William Penn by King Charles II of England. A coveted location, this deep, sloping lot overlooks rolling hills of the Brandywine Valley and neighboring Brandywine Creek State Park. Existing trees and strategic landscaping have created natural boundaries between properties on both sides, and full southern exposure guarantees abundant sunlight all year long. Build your dream house in this pristine location, tucked away in the picturesque hills yet conveniently close to Wilmington, Greenville, and surrounding areas.