The Whistle Stop Café in High River is a rail car that has been redesigned as a café. They do a brisk lunch service, so if you are coming from out of town, make a reservation to ensure you get a table. It is a nice place to sit and chat and look at a bit of history. I had a chicken mango quesadilla that was nice, and I know from previous visits that the pies are quite fine as well. Service is friendly and you will leave happier than when you came in.
Here is a link to their website.
It is tarped for repairs at the moment.