This iron bridge across the Kwai Yai River is the main attraction for many visitors. Immortalized in the famous movie and novel, it was a part of the infamous Death Railway to Burma, constructed by POWs working for the Japanese in hellish conditions during WWII. Some 16,000 POWs and 90,000 Asian workers (most of them enslaved) died during railway construction. The present iron bridge is the second wartime incarnation (a part of the original can be found in the War Museum), but two central box spans were rebuilt after the war to replace three sections destroyed by Allied bombing.