Possible Clues:

• River with famous bridge
• ''The Bridge on the River ---''
• "The Bridge on the River __": 1957 Best Picture
• River in a 1957 hit movie
• Title river in a 1957 film that won seven Oscars
• "The Bridge on the River ___"
• 'The Bridge on the River --' (war film)
• River associated with the 'Death Railway' in Thailand
• Title river in 1957's Best Picture
• Title river in a 1957 film