This place is all kinds of awesome. I've loved trains ever since I was a little kid. And now the big kid in me made sure we paid a visit to what is supposedly North America's largest accredited model railroad museum.
They have gigantic recreations of actual geography like the Tehachapi pass loop and the Goat Canyon Trestle. You'll find separate landscapes for O, HO, and N gauge setups, as well as a toy train section. Each and every one of the engineers are completely passionate about what they do. It's obvious.
You could spend a couple of hours and not notice all of the little details like the overturned chicken truck. In fact, the operator had to point out the wolf that was running away with one of the chickens in its mouth. Fantastic stuff!