The movie really is good enough for its genre. The story well written and paced, the characters well portrayed, especially by Granger and Douglas. Granger was a natural as the adventurous treasure hunting mining engineer , Douglas, solid and humane , played his long time partner and friend. Together, they fought the hardship of mining, the bandits, sometimes each other, and for the girl Kelly. Kelly was a bit out of place here. She though was very beautiful but somehow too civil and too dignified for the south American jungle background. Her romance with Granger lacked intensity and passion. Fortunately, the story and some actions provided enough intensity and excitement , made the movie quite enjoyable