Waymarking the Pere Marquette

I ran across some posts on Waymarking from earlier this week--it looks like the poster, steveherrick, is making his way north along Amtrak's Pere Marquette. In his first post he's got some great pictures of the old Pere Marquette station in St. Joseph, now used by Amtrak. For his second post he's up in Holland with photographs of an old PM caboose built by the St. Louis Car Company. I've never used Waymarking before but it looks pretty cool; some quick searching turned up lots of pictures of trains stations, old cars etc.