In 2017 I did vist Kanchanaburi. First we did visit the Bridge over the River Kwai, the War Museum and the War Cemetery in Kanchanaburi town. The next day we made a 70 km trip to the (in)famous Hell Fire Pass & Museum. The Hell Fire Pass thanks his name to the hell that the POW's endured during WorldWar 2 and building the Death Railway from Bangkok to Burma (Myanmar). You can walk a 800m trail to the place where POW's by hand cleared a small rocky mountain for the railway. At the beginning of the trail is a museum to explain the hardship of the POW's and how life was in those days. The photo is showing the Hell Fire Pass where the railroad used to be. A very impressive place to visit and the museum (managed and paid by Australian government) gives very good information about what happend in Kanchanaburi during WorldWar 2.