I have discovered a series of American trains built in the 1930's that were designed with an Art Deco style. These Streamliner Locomotives are absolutely stunning and huge in size. Unfortunately they did not get much use in their time and were quickly replaced.
The looks of these trains are so unique and different from anything I've seen before. I find it hard to believe these were actually really built and run. They would look right at home in a science fiction film. Here's some quick sketches of three I found particularly inspiring.