In this video, Pilentum presents a very beautiful model railroad display built in O scale. It is a small modular layout containing steam trains which were used by German Federal Railways. Indeed, nothing special but nice to watch.
YouTube:
https://www.youtube.com/watch?v=PCPuXALVEhM
model train model railway model railroad 0 gauge o gauge 0 scale o scale model train trains railway railroad modular layout steam locomotive