We love it when PCB artwork is actually artwork. Here’s one example of a radio whose layout mimics the map of London’s subway system.
The build is for an exhibit at the London Design Museum. They have an artist in residence program which allowed Yuri Suzuki time and resources to undertake the project. He speaks briefly about the concepts behind it in the video after the break.
The top layer of copper, and silk screen was positioned to mirror the subway lines and stops on a traditional transportation map. Major components represent various transfer hubs. In this way he hopes the functioning of the circuit can be followed by a layman in the same way one would plan a trip across town.
This may be a bit more abstract than you’re willing to go with your own projects. But there are certainly other options to spicing you track layout.