The image is a photograph of a plaque on a wall. The plaque is rectangular in shape and has a dark blue background with white text. The text reads "California & Nevada Railroad" in large, bold letters at the top. Below the text, there is an illustration of a train crossing a bridge. The bridge is made up of multiple trusses and beams, and there is a train on the tracks below it. 

The plaque also includes information about the California Nevada Railroad Historical Society, which was founded on March 7, 1937. It states that the railroad was the first railway in the United States to operate in the early 20th century. The date "October 1998" is also included at the bottom of the plaque.

Overall, the plaque appears to be a historical marker or plaque commemorating the history of the railroad in California and Nevada.