The Secretary of the Interior is authorized, in his discretion, to accept the fee-simple title to a certain tract of land adjoining the Hot Springs National Park, Arkansas, described as being the west half of the southwest quarter of the southwest quarter of section 27, township 2 south, range 19 west, fifth principal meridian, containing sixteen acres, more or less, situated in Garland County, State of Arkansas, donated to the United States of America for use in connection with Hot Springs National Park: Provided, That such land when accepted by the Secretary of the Interior shall be and remain a part of Hot Springs National Park.