The latest installment to Crash Course World History is all about the effects of the development of railroads during the industrial revolution. The Railroad Journey and the Industrial Revolution isn’t about the building of railroads. In the video John Green covers how rail travel led to changes in where people lived, where they vacationed, and how they interacted with each other. A short lesson on the origin of Greenwich Mean Time is included too.
To bring the lesson into a current context, Green also does a nice job of making comparisons between the effects of the development of railroads and the effects of the development of the Internet.
For more resources on railroads, check out Living With Railroads.