Unknown World (1951)

In a world teetering on the brink of nuclear catastrophe, Dr. Jeremiah Morley spearheads a daring expedition. Fueled by the conviction that the end is nigh, he rallies a team of exceptional scientists and engineers, equipped with a groundbreaking atomic-powered rock-drilling vehicle, the "Cyclotram." Their mission? To discover a subterranean sanctuary, a safe haven where survivors of the predicted apocalypse could sustain life indefinitely. However, when financial support dwindles, the operation finds an unlikely savior in Wright Thompson, a wealthy thrill-seeker. His one condition: he must join them on this perilous journey into the unknown. As they delve deeper into the bowels of the Earth, the pressure intensifies. Personalities clash, sparks fly, and the treacherous voyage exacts a deadly toll on the team. But when they stumble upon a vast, hidden underground realm, complete with its own luminescent ocean, it seems their audacious goal is within grasp. The promise of a new world, untouched by nuclear devastation, shines like a beacon in the darkness beneath the Earth's crust.

Unknown World is an adventure movie featuring Bruce Kellogg and directed by Terry O. Morse.

Unknown World is currently streaming for free (ad-supported) on Tubi TV and it's also available on Classix, Cultpix and FlixFling.

It is also possible to buy Unknown World on Amazon Video and FlixFling.