The Unknown Terror
- Yil: 1957
- Mamlakat: United States of America
- Janr: Horror
- Studiya: Emirau Productions, Regal Films
- Kalit so'z: amazon rainforest, mad scientist, missing person, underground cavern, man with limp, fungus people, primitive village
- Direktor: Charles Marquis Warren
- Cast: John Howard, Mala Powers, Paul Richards, May Wynn, Gerald Milton, Duane Grey