Metropolitan Department of Diesel Train

When I was a middle school student (1994? 1995?), all our students went to Gyeongju, a historical city in South Korea from Seoul. It took around 13 hours and the train stopped every single station during the travel. Dirty restroom, no food, uncomfortable riding quality, oily smells coming from an outdated diesel engine.

Nowadays, a much younger generation took a school trip by airplane which I still can't imagine how it will be comfortable and faster than the old and nasty train.

As I keep missing those old things, I feel like I'm too old now :)