The addiction can be tempered by booking *ONE*. Are endless possibilities. Can't do it all.

In addition to expert flyer the wikipedia entries for airports tend to have routes/airlines, in a simple uncomplicated format.
As some find this web site useful--> https://www.flightconnections.com/

For the AU train trips can have a different number of nights on the train depending on the direction. Are now sold as "train trip with off train excursions", Not just a simple train tickets as in times past. Beware of resellers.
Official site https://www.journeybeyondrail.com.au/
https://en.wikipedia.org/wiki/Journey_Beyond
https://en.wikipedia.org/wiki/Indian_Pacific
https://en.wikipedia.org/wiki/The_Ghan
.