When I asked how he found the place, he stated that a climbing buddy of his had been riding his bike around town and saw it as a fun thing to climb. He spent a few weekends cutting away all the weeds and overgrowth surrounding the wall. Then made it into a secret spot for him and his friends to use as practice near their homes. They were only stopped a few times by police questioning what they were doing on the tracks....oh and they mentioned something about government property. Oh wellz...
While we were there, only one train passed by us and the conducter tooted his horn and waved. The climb was pretty technically difficult due to the few and far apart holds in the wall as well has minimal grooves to put your feet on. By the end of the climb, all our fingers were raw from crimping.
I guess this experience goes to show that you can literally climb ANYTHING.