Here are a couple ideas....
I make (made, wood burned, and sold) a lot of these. Past tense because of work, family time, etc. But, I just got my hands on some nice pieces of old barnwood that I am itching to do something with. Either of these make great displays.
Here is a shadow box with a plexiglass front I have in my office at work.
This one is a unique piece of old barnwood.