Here is my Mine train through Nature's Wonderland On30 4 X 7 layout. As you can see, It's still in it's construction phase.
That popsicle stick structure is (or will be) Cascade Peak
That locomotive you see on the track closes to you is a Bachmann 0-4-0 porter that will be painted to look like the NWRR trains later.You could also see the bear country trestle.
Instead of going underground, The train just goes over a cross.