We used railroad ties from the 40's, same age as the house, to make the wall and steps. When the new courtyard is finished we'll backfill the wall with soil to plant shrubs deer don't like. This project took a good bit of digging gravelly dirt and moving heavy, splintery beams in record heat. Which was 73, I think. Hot for us. It's the humidity.
The back stairs, which get the most use, need to be painted and I have the idea (I shouldn't entertain ideas! It means a lot of work!) to tile the stair risers. Making the tiles myself. So I'm thinking of impressing leaves or other interesting natural objects in the clay. Not sure of any of this yet. All I've done so far is measure the risers and collect leaves to make test tiles.