Question: is the bridge on the river kwai still there

Answer: Yes, The major railway bridge described in the novel and film didn't actually cross the river known at the time as the Kwai. However, in 1943 a railway bridge was built by Allied POWs over the Mae Klong river -- renamed as a result of the film Khwae Yai in the 1960s -- at Tha Ma Kham, five kilometres from Kanchanaburi, Thailand. Boulle had never been to the bridge. He knew that the railway ran parallel to the Kwae for many miles, and he therefore assumed that it was the Kwae which it crossed just north of Kanchanaburi. This was an incorrect assumption. The destruction of the bridge as depicted in the film is also entirely fictional. In fact, two bridges were built: a temporary wooden bridge and a permanent steel/concrete bridge a few months later. Both bridges were used for two years, until they were destroyed by Allied bombing. The steel bridge was repaired and is still in use today.