When I looked at the stairs in the blown up picture file, I couldnt positively say that the stairs are concrete. They could be a very weathered rail road tie covered in worn creosote. There is a nail on one one end. could be rebar though. could be. just sayin'. M O O
They looked like stone to me, but I guess weathered wood could be too. The picture with the man in it is probably the best one to look at in trying to determine that, but I don't know where that one came from or how to blow it up.