Unknown World
- අවුරුදු: 1951
- රට: United States of America
- ප්රභේදය: Adventure, Science Fiction
- ශබ්දාගාර: Lippert Pictures
- මූල පදය: cave, exploration, scientific expedition, tunnel, underground lake, subterranean world, underground cavern, woman scientist, poison gas
- අධ්යක්ෂක: Terry O. Morse
- කාස්ට්: Bruce Kellogg, Otto Waldis, Jim Bannon, Tom Handley, Dick Cogan, George Baxter