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