Kanchanaburi, a two hour drive from Bangkok, is the home of the famous black iron bridge which was brought from Java by the Japanese and reassembled by Allied prisoners-of-war as a part of the "Death Railway" between Burma and Thailand. Frequent bombings in 1945 damaged the structure but when the war ended it was rebuilt and is still in use today. Second World War-vintage steam engines and a road/rail car form a small railway museum at the eastern end of the bridge.
A Japanese War Memorial can be found just south of the bridge.
Bus, rail, and tour vans connect to Kanchanaburi daily from Bangkok. A guided tour including transportation in a van cost about 750 baht (less than $20US). Rail trips can be taken over the remaining stretch of the "Death Railway". The track crosses a wooden viaduct over the river which clings precariously to a steep, cave-ridden cliff. The trip makes clear the difficulties experienced when constructing the tracks.
Each year in late November or early December River Kwai Bridge Week gives people a chance to visit historical displays, ride the vintage trains, watch a nightly sound and light show and take part in a carnival complete with sideshows, folk entertainment and rides.
People walk over the bridge between train times. There are small platforms on either side of the tracks so you can step aside if your timing is off.