Great thread Arnold! I really enjoy the beautiful "train caves' and layouts featured here.
My tiny slice of paradise is only 16 in wide by 8 ft long. Its a seasonal layout (comes down in the spring and summer and back up for the fall and winter) that occupies a section of our den. This is my first O-Gauge "layout" and I hope to have time to expand it this season. It has two key features - a coal tower scene and a depot scene. It's an admittedly modest pike, but brings me hours of enjoyment none-the-less.
Here's the coal tower scene with a line-up of Pennsy power.
Here's a couple of pics of the depot scene.