the Scenic Railway at
Luna Park, Melbourne, is the oldest continually-operating
roller coaster in the world, and one of only three rollercoasters
(the others being in Great Yarmouth, UK, and Copenhagen,
Denmark) that require a brakeman to stand in the middle of the train.
The above from; https://en.wikipedia.org/wiki/Luna_Park,_Melbourne

LUNA PARK - JUST FOR FUN