Landmarks are unique natural or human-made structures that help us identify were in thew world we are. This fascinating series features the landmarks-mountains and waterfalls, ancient buildings and statues, and modern bridges and towers-that different countries are known for. You Are Here: United States Welcome to the United States! Discover the landmarks that maks the United States well known around the world-natural wonders, such as Old Faithful and the Grand Canyon, monuments, such as the Statue of Liberty, and historic buildings, such as the White House.