Rockburn Branch Park includes the Clover Hill Farm House and a historical complex intended to interpret the contributions of founding county families. The Clover Hill Farm House, built before 1798 by George Scott, a tanner, miller, and tradesman, is a five-bay-wide, two-bay-deep, two-and-a-half-story gable-roofed structure of brick and frame construction whose craftsmanship reflects unusual wealth for a farm family of its time. The Department acquired the house in 1990, and its conversion for restaurant use and curatorship began in 2002 while work remained unfinished. The site also includes or was planned to include relocated historic structures such as the Gorman Cabin, the Aaron MacKenzie Barn, and the Pfeiffer Corner Schoolhouse. The Gorman Cabin, a circa 1800 log cabin measuring twelve feet by twenty feet and one-and-a-half stories high, was donated by the Janet Phelps family, moved to the site in 1984, and later destroyed by arson after reconstruction began in 2001. The Aaron MacKenzie Barn, a late 1860s log livestock barn about twenty-five feet by twenty feet, was given in 1986, moved in 1987, and was undergoing reconstruction. The Pfeiffer Corner Schoolhouse, a rare surviving one- or two-room schoolhouse in Howard County dating from the later nineteenth century and possibly as early as the 1860s, had been altered into a private residence after its school use ended, and its separate outhouse is typical of the period; after being moved in 1988 from Pfeiffer's Corner to the Middle Patuxent Environmental Area, it was relocated to Rockburn Branch Park in 2003. Archaeological survey of the land also uncovered several American Indian arrowheads.