Legend of the Lost

Legend of the Lost is a 1957 ItalianAmerican adventure film produced and directed by Henry Hathaway, shot in Technirama by Jack Cardiff, and starring John Wayne, Sophia Loren, and Rossano Brazzi. The location shooting for the film took place near Tripoli, Libya.

Just as they run out of water, they stumble upon the ancient city and a well. There, they find three human skeletons, a woman and two men. It becomes evident that Pauls father found his woman in the arms of his guide, killed them and then himself. There is also no treasure to be found. Pauls faith in his father is shattered and he becomes drunk.They find the treasure after Joe deciphers the clues left by Pauls father. They load it and prepare to leave in the morning. Paul makes an attempt to seduce Dita she rejects him and he gets into a fight with Joe. Later, Paul sneaks away during the night taking all the animals, supplies, and treasure with him and leaving the other two to die. ........

Source: Wikipedia