Within the bounds of Frankford exists an enclave known as Northwood. Northwood is made up almost entirely of pre-World War II twin and single-family dwellings. Northwood is bounded by Harrison Street to the south, Roosevelt Boulevard to the west and Oxford Avenue to the east, its northernmost point being Sanger Street, just below the intersection of Castor Avenue, Roosevelt Blvd (U.S. 1) and Oxford Avenue. However, a more broad definition of Northwood would extend to Adams Avenue on the south, including the location of Northwood Park and the larger mansions on Castor Avenue south of Harrison Street.