Unknown World
- Afọ: 1951
- Mba: United States of America
- Dị: Adventure, Science Fiction
- .Lọ nka: Lippert Pictures
- Isiokwu: cave, exploration, scientific expedition, tunnel, underground lake, subterranean world, underground cavern, woman scientist, poison gas
- Onyeisi: Terry O. Morse
- Nkedo: Bruce Kellogg, Otto Waldis, Jim Bannon, Tom Handley, Dick Cogan, George Baxter