Hey, they're maps - even fantasy maps, in the broad sense.

That second one either has mighty tight curves, or else it's got mighty long reaches for the five-finger sky-hook to handle derailments.

"Outside your modeling capabilities"... why? I'm a great proponent of "ya can do pretty much anything ya set yer mind to". Particularly if the track is prefab stuff, you can get something running pretty quickly to scratch that itch of seeing trains move, and you can tinker and experiment your way into more complete scenery. With care, your first attempt at a roundhouse or a trailer park doesn't need to be your ultimate version.

Looks like you're fairly cautious to limit what you stuff into place - realizing elements take more space than they might seem. The uninitiated might assume one could have a more extensive town in that dogbone, for instance - you seem to have it about right - just sketching in a town's edge. If the straight side of that layout winds up against a wall though, you're relying on being able to reach over the town to get to those back tracks.... a recipe for disaster at least for my oft-clumsy elbows.

Thanks for the look at, ummm, alternate-history dioramas. :-)