I like foreign trains.
I bought a prepaid card named “opal card” and took on a double-decker train in Sydney.
Double-decker train is interesting for me. Probably it is not special nor interesting for Australian people but it is unique for travelers, I think.
Fare is not low priced but the card is convenient for foreigners.
I put St. Mary Cathedral. It was beautiful and one of my favorite cathedrals.