2026-02-04    Amazing - and Free - Map Collections: Historical maps can make a huge difference in helping you locate places where events happened in your ancestors' lives. In this video, you'll learn about the two largest, free map collections in the United States: the Library of Congress collection and the New York Public Library Collection. Map examples are shown, as well as tips for finding maps on the sites. Learn more about map strategies for research in Goal A2 in the United States page.