I think it is a good idea, Bobert. There are many theme parties or segments thereof
, and railroads are a frequent theme. Not to mention that it would be fun to learn some that people around here don't know. :)

Juneau, Alaska has no trains and I miss them. They keep talking about cutting a road north to end close to Skagway. It is controversial because it is mountainside all the way with 68 known avalanche chutes and there are a number of sea lion rookeries that would be impacted, as well as other wildlife.

My suggestion is to build a railway, mostly inside the mountains' edges with occasional open air arches; in addition to a passenger car and freight car they should add a couple of flat beds where people could transport their cars.