Salubria was a historic site with intact archaeological evidence of Woodland Era Indian encampments from 1300-1600 A.D., and the Piscataway–Conoy was one of the tribes that frequently inhabited the region. In 1687, Col. John Addison acquired acreage later called Oxon Hill, which he devoted to tobacco growing. During the Revolutionary War, John Hanson, one of the Presidents of the Continental Congress, died at Oxon Hill. In 1830, John H. Bayne built a house called Salubria here on land carved from Oxon Hill. He was a prominent doctor, horticulturist, educator, and politician, and he trained his slaves to assist him in developing innovative methods to grow fresh produce for the nation’s new capital. The site also includes a public memorial dedicated to the emancipation of all enslaved people in Maryland on November 1, 1864, and a Potomac River Heritage Visitors Center focused on Salubria’s history of racial and economic developments and nearby historic places.