I recently had a service call in Rensselaer, Indiana. On the way back to the shop I passed through Monon, Indiana. Just north of town is a museum dedicated to the Monon Railroad called Monon Connection. I only had a few minutes to stop, and it was starting to rain, but I did get a few pictures of the outside displays. While they do not have any motive power, there is quite a collection of rolling stock, including a wrecking crane. Unfortunately, I didn't have time to check out the inside displays, but I do remember that there was a very nice collection when I visited a few years ago.
If you are in western Indiana and have a chance to stop here, you won't regret it. It is located on US-421, just north of Monon.
Here are some of the photos I took. Enjoy!
Tom
This caboose is located at the Wye in downtown Monon