have you ever done a bicycle rail car? this stretch of railway off of route 7 on the Eastern coast lets you do just that. the scenery is beautiful. it was such an interesting experience. you even go through a tunnel portion which is slightly useless, but the trippy lights and strange interior decorating make it entertaining at least. can’t change the railway, right?
it begins at Samcheok and the ride is some 5 kilometers. don’t worry, it requires little to no actual physical exertion.
highly recommended: the Korea tourism info page about it
adding this on the list of things to do.