With the cyclotram, an atomic-powered rock-boring vehicle, Dr. Jerimiah Morley leads an expedition into a subterranean world.
| Release Date | October 26, 1951 | |
|---|---|---|
| Status | Released | |
| Original Title | Unknown World | |
| Runtime | 1h 14min | |
| Budget | — | |
| Revenue | — | |
| Language | English | |
| Original Language | English | |
| Production Countries | United States of America | |
| Production Companies | Lippert Pictures | |