Railfan Location Guides
This page provides off site links to various railfan location guides:
Frog Rail Tony Hill turned the site over to Bruce Harper in 2011 to continue the 10+ years collection of railfan "tours" and guides compiled there.
Toledo, OH Railfan Location Map by Michael Harding
This map tags photo locations in the Toledo area with example pictures taken at those locations. Train number and date taken are generally noted along with other information in the linked picture captions.
Rails In Virginia Jeff Hawkins produces some excellent PDF guides for railfans centered around Richmond, Virginia including railroad placenames, train symbols and frequencies, radio channels, and more.