Inspired by the thread about longest airplane flight, I’d be curious as to other forms of public transportation. This might apply to the longest scheduled conveyance that contains intermediate stops (e.g. a San Francisco to Chicago train ride) as well as longest distance between stops (e.g. Hong Kong to Santiago on a cruise ship). This question could apply to scheduled ship cruises, commercial buses, sight-seeing tours, elevators, funiculars, trains, subway lines, aerial trams, or any form of scheduled public transportation.
I know that there are probably around-the-world cruises, so those would probably win the longest cruise ship. What are some others?