OK i found the description in the Gunslinger so here it is.

it was a building. No two buildings, surrounded by a fallen rail fence. The wood seemed old, fragile to the point of elvishness; it was wood being transmogrified into sand. One of the buildings had a stable-- the shape was clear and unmistakable. the other was a house, or an inn. A way station for the coach line. the tottering sand-house (the wind had crusted the wood with grit until it looked like a sand castle that the sun had beat upon at low tide and hardened to a temporary abode) cast a thin line of shadow, and someone sat in the shadow, leaning against the building. And the building seemed to lean with the burden of his weight.

here it says it's a waystation for the coach line but i like the idea of a train stop so i'm going to change that. I do like the sound of the fence so i'll add that and take away some of the bushes i was planning on putting in.