Maintain, either in an existing structure acquired under the provisions of section 450aa of this title or in a building constructed by him for the purpose, a museum for relics and records pertaining to George Washington Carver, and for other articles of national and patriotic interest, and to accept, on behalf of the United States, for installation in such museum, articles which may be offered as additions to the museum; and

Construct roads and mark with monuments, tablets, or otherwise, points of interest within the boundaries of the George Washington Carver National Monument.