In 1997, I was working in Thailand, and took a weekend visiting the bridge over the River Kwai and the surrounding countryside.  If I recall correctly, this is a rebuilt bridge, as the original that cost so many Allied soldiers’ lives, was bombed after completion.  The bridge and a section of the Death Railway towards Burma is still open, as evidenced by the multiple units.  The museum next to the bridge has some trains on display, as below.

My lasting memory of the visit was how it took about 3 hours by coach from Bangkok to get to the bridge.  In WWII, it took months and countless lives to get the railway there.