This was one of the first images I had taken using a new cell phone. The image comes from the top of Pikes Peak in Colorado. The railroad here is a cog railway: the little teeth running down the center line are able to catch and hold the train to help gain traction going up steep slopes as well as keep it from running backwards down the mountain when the train stops. Some cog railways are no more than two feet wide to get through narrow mountain passes; this one is more like four.
If you’re interested in buying a print of this, you can get one through DeviantArt for around 20-60$ (depending on size).