Watch Mystery on Monster Island (1981) Online
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- RUNTIME: 1h 45m
- COUNTRIES: Spain,United States of America
- Subtitles: English,Español
A young European boy living in San Francisco is reluctant to marry his long-term girlfriend because he wants to travel around the world first. His wealthy uncle agrees to send him on a global expedition aboard his ship, but en route the boy and his travelling companion are shipwrecked on a remote island, populated by countless prehistoric creatures as well as gold-hunting bandits.