Nevada State Railroad Museum Boulder City shared by @onthegrid says: ""At the time that Hoover Dam was being built, this railway was the only way to move the massive amounts of materials from Las Vegas to Boulder City. Union Pacific constructed the three separate railway lines starting in the 1930's. The first public runs on the restored open-air car and air conditioned coach trains began in 2002. Tickets are available for weekend train rides, and are a must-do while in Boulder City."" on Postcard