I love the composition, and the b&w conversion is very nice, but I think they're both missing a focal point. Something that isn't just a part of the stairs. Nearly anything might have worked, from an abandoned beer can to a small furry creature to a pretty girl. It does a very good job of drawing the eye into the image, but to what?
In the color version, the moss *almost* does it, and then the little plant in the lower right *almost* pulls it off.
I love both images as a starting place, though. I can't tell how big it is, but I'd mark that place in memory for location portraits in the future. Just in case.