Kanchanaburi was discovered during World war 2 by Dr.Van Heekeren. He is the archaeologist Dutch and he is the detainees were prisoners of war that build the railway in Kanchanaburi. He had discovered prehistoric stone tools and later confirmed that the old stone age tools. This tools is called "Kwai Culture". It was discovered prehistoric archaeological evidence for the first time in Kanchanaburi, so Kanchanaburi is widely known and very popular.