If you loved The People That Time Forgot, try At the Earth's Core
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Kevin Connor, and they both carry the playful mood tag, and they sit in Adventure / Fantasy / Science Fiction territory. If that's the register that drew you to The People That Time Forgot, the second film will land in a comparable space — through a different lens.
playful
What At the Earth's Core is
Journey to the Center of the Earth meets King Kong. Scientists drill into earth's core. Over-the-top adventure ensues.

