Fort Smith National Historic Site - http://www.nps.gov/fosm

At Fort Smith National Historic Site you can walk where soldiers drilled, pause along the Trail of Tears, and stand where justice was served. The park includes the remains of two frontier forts and the Federal Court for the Western District of Arkansas.
The main entrance to the Visitor Center is located on the south end of the Barracks/Courthouse/Jail building. Exhibits in the visitor center focus on Fort Smith’s military history from 1817 – 1871, western expansion, Judge Isaac C. Parker and the federal court’s impact on Indian Territory, U.S. Deputy Marshals and outlaws, Federal Indian policy, and Indian Removal including the Trail of Tears.

Located on the grounds are the foundation remains of the first Fort Smith (1817-1824), the Commissary building (c. 1838) and a reconstruction of the gallows used by the federal court. A walking trail along the Arkansas River includes wayside exhibits on the Trail of Tears.