An elderly English doctor and his 14-year old American nephew go on a perilous journey to Africa in an hot air balloon with an African guide, to retrieve a precious diamond from the top of a volcanic rock, as a gift for Queen Victoria.

• DirectorChris Cuddington
• Release1 January 1977
• Genre
  Animation / Adventure
• Duration1h
• Budget?
• Revenue?
• Rate
  

  6.5
  2 reviews
• Productions

  Hanna-Barbera Australia