Good resources to learn more about railroad history include the Independence Hall Association, the Library of Congress and the Railway and Locomotive Historical Society, Inc. These resources include historical information such as the location of various railroads, operating line maps and the importance of railroads to the United States as well as photographs of railroads.
The Railway and Locomotive Historical Society, Inc. also offers a history journal and is known as "the oldest railroad history organization in North America." Railroad survey maps and information about what companies purchased and built is also available through the Library of Congress. Fun facts are also available on the Independence Hall Association website, such as the fact that 20,000 men worked on the first transcontinental railroad in the U.S. putting in almost 240,000 working hours.