There are (were?) three museums in Kanchanaburi. In order of must-see-ness:
 
	The Death Railway Museum and Research Centre in the centre of the town between the station and the war cemetery, is the largest and newest, well up to modern western museum standards and well worth a visit. 
 
	The JEATH War Museum a little way downstream has photographs and illustrations of life in the camp, some made by the POWs, but is basically a one-monk project and badly underfunded, so don't expect too much.
 
	The "other" JEATH museum, the "World War II and JEATH War Museum" next to the bridge, has a lot of miscellaneous WWII stuff and some miscellaneous stuff. According to Google it's temporarily closed.