Here's another video of another micro layout from Scott's Trains: https://www.youtube.com/watch?v=L5rxx1168Ho.
I post these as I find them in the hope that it will inspire people to make their own.
Notice that this one has 2 track levels with some cool bridge and tunnel work. The lower level track has some intricate switch and loop work. It just goes to show that you can do big layout stuff on a small footprint!