The California State Railroad Museum in Old Sacramento is the world-class tribute to the role of the "iron horse" in connecting California to the rest of the nation. The museum features 21 lavishly restored locomotives and cars, some dating back to 1862. There is a full-scale diorama of an 1860s construction site high in the Sierra Nevada as well as a bridge elevated 24 feet above the museum floor.  Enjoy 4 tickets.

See: http://www.parks.ca.gov/?page_id=668