Pacific Southwest Railroad Museum [CA]
"The Pacific Southwest Railway Museum Association is a non-profit educational organization dedicated to the preservation and interpretation of railroads as they existed in the Pacific Southwest." The museum hosts an impressive collection of railroad equipment, including locomotives, freight cars, passenger cars, cabooses, and even support equipment.
The site offers a virtual tour, a history of southwestern railroads, a photo gallery of the museum's collection of railcars, and an events calendar.