It is worth a visit and highly recommended. It is a free library that must be visited in the Washington area. The Library of Congress is the largest library in the world. It is not only the national library of the United States, but also an important global research center. It has a rich collection of documents in various forms, including books, manuscripts, maps, photos, music, movies, etc., with a total of more than 170 million items. In such an environment, time seems to stand still, and every detail can trigger infinite reverie. The Library of Congress is not only a palace of knowledge, but also a meticulously crafted work of art. Every visitor is fascinated by it and feels its unparalleled beauty.