It boasts over 6000+ photos of railroading. It has a ton of old school photos like the Southern Pacific RR in California during the 1970s (which was what I was looking for when I discovered the site}. But it's got photos from a lot of different years and railroads.
These old school photos just bring me back to my childhood chasing trains with my father. They will let you re-live your past! If you are too young, it let's you see what it was like back then for those of us that are older than you.
It's called "Carr Tracks" and here's a direct link to the gallery section.....
http://www.carrtracks.com/gallery.htm
Enjoy!!
