I know it's technically impossible, but there just needs to be sidewalks. I live closer to ceremony than to Common Ground, but I ended up going to common ground because I could walk there.

I can't remember where I read it, but from what I understand the B&O Museum in Bmore is the unofficial Smithsonian of trains, because they don't have the ability to display them all. I can't cite that source, so feel free to disregard.