Send a comment on this item to LII: Send a comment on this item to LII staff, who on weekdays will usually reply within 24 hours. Union Pacific Railroad History Profiling the history of Union Pacific and its effort to construct the first U.S. transcontinental railroad, this site has an extensive collection of historic train photos, images, and maps. Includes a short history of the caboose, brief descriptions of past and present railroad jobs, and more. http://www.uprr.com/aboutup/history/ Asterisk * indicates required field. Your Name Your Email Address * We will not sell or provide your email address to anyone else. Comment * Enter the verification code as it is shown in the box below. This helps prevent automated submissions. *