Today, April 3rd, was the day the the “Gyeong-Ui Railroad” (경의선) opened. In 1906. It connected Seoul and Sinhui on the North-Korea/Chinese border. I saw this mentioned in the newspaper in the “On this Day in History” section,
This rail line still exists intact, today, It was incorporated into the ever-growing Greater Seoul urban rail network (still often loosely called a ‘subway’) in 2009. I remember when that happened, as I was living in Ilsan at the time, through which it passes. One station was only 10 minutes’ walk from my workplace.
I have ridden on this rail-line more than a few times. It is pleasant to ride, and takes not more than a half hour between Ilsan and central Seoul. You can ride it today way up north, to within a stone’s throw of the DMZ.
I have even walked through Dorasan, the northern-terminus station of the line.