The board of county commissioners of any such county may dedicate and set apart for use as playgrounds, recreation centers, and other recreational purposes any lands or buildings, or both, within said county owned or leased by such county and not then devoted to another public use; and such county may, in such manner as may now or hereafter be authorized or provided by law for the acquisition of lands or buildings for public purposes by such county, acquire or lease lands or buildings, or both, within said county for playgrounds, recreation centers, and other recreational purposes, and when the board of county commissioners of such county shall dedicate, set apart, acquire, or lease land or buildings for such purposes it may, on its own initiative, provide for their conduct, equipment, and maintenance as now or hereafter authorized and provided by law.