The least faithful but most fun Burroughs adaptation.
The Land that Time Forgot was the most faithful and accurate adaptation of the book but it was a bit slow. We didn't get into the Land until halfway through the picture.
The People that Time Forgot was only 50/50 in its accuracy and I was not impressed at all.
This film was very unfaithful in many ways but it was lively and fun.
Instead of a hollow earth teeming with Dinosaurs and Mastodons and Sabre-tooth Tigers they instead are in a continent sized cavern filled with bizarre creatures that never lived in the upper world.