“Drilling into the forbidding depths of the earth!”
With the cyclotram, an atomic-powered rock-boring vehicle, Dr. Jerimiah Morley leads an expedition into a subterranean world.
2 landscape wallpapers · click any to open Mac Mode
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Last updated: June 9, 2026
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Quick answers about Unknown World wallpapers, cast, and downloads.
Moviely has 2 free Unknown World cinematic wallpapers available to browse, preview in Mac Mode, and download.
Yes. Every Unknown World backdrop on Moviely is free to preview and download for personal desktop or mobile wallpaper use.
Unknown World wallpapers are available in HD and original quality, with smart resolution suggestions based on your display.
Yes. Open any Unknown World wallpaper in Mac Mode to preview it on a desktop or iPhone lock screen before downloading.
Open the Unknown World page, pick a backdrop, choose your preferred resolution (HD, Full HD, or Original), and click Download.
Unknown World released in 1951. Moviely hosts cinematic wallpapers captured from the movie's official backdrop imagery.
Unknown World is categorized as Adventure, Science Fiction.
Terry O. Morse directed Unknown World.
Unknown World stars Bruce Kellogg, Otto Waldis, Jim Bannon, Tom Handley, Dick Cogan, and more.
Unknown World has a runtime of 1h 14min.
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