If you are planning to visit the Tiger Temple 45 km outside Kanchanaburi, which by the way is a good idea, why don't you then take a trip also including a visit to the famous historic venues in Kanchanaburi, since you will be passing them anyway. So make sure you'll make a stop in Kanchanaburi at the War Cemetary with 7000 headstones for allied soldiers who died during the building of the bridge and 'Death Railway' for the Japanese in World War II, and a stop at the historic Bridge over the River Kwai before you're heading for the Tiger Temple.