Yep, in areas that get snow, you'll see peaked roofs behind the sign boards. If you take a look at the Google maps satellite view of the museum, you can clearly see the peaks, and the sign boards are casting shadows out into the street. You can also see the boardwalks there. As I recall, the first building up usually got a porch, then those that went up to either side simply extended their own porches to meet the existing structure. Do note that that map shows a lot more trees than would probably have been present in the 1800's, though. The prairie isn't kind to tall trees, and they tend to only grow near the rivers. When I was growing up, my idea of a forest was what most people would call a copse. I still get a little awestruck by the sheer number of trees I see here in Colorado.