I have always been fascinated with the idea of going into the Earth and finding another Earth. The original movie, "Journey to the Center of the Earth" was one of my ultimate favorites, but luckily other moviemakers decided to go for the same concept and gave us a bunch of movies for us Hollow Earth nuts to enjoy!
Journey to the Center of the Earth
There are a lot of versions of "Journey to the Center of the Earth" but because I like y'all, I'll only mention the one worth mentioning--the 1959 version with James Mason and Pat Boone. "An Edinburgh professor and assorted colleagues follow an explorer's trail down an extinct Icelandic volcano to the earth's center." One of my favorites of all time! (STEAMPUNK DELIGHT)
Nazis At the Center of the Earth
"Nazis At the Center of The Earth" 2012 - "Researchers in Antarctica are abducted by a team of masked storm troopers. They are dragged deep underground to a hidden continent in the center of the earth. Here Nazi survivors, their bodies a horrifying patchwork of decaying and regenerated flesh, are planning for the revival of the Third Reich."
"The Core" is a 2003 movie with Hilary Swank (what was she thinking?) "The only way to save Earth from catastrophe is to drill down to the core and set it spinning again."
At the Earth's Core
This 1976 movie, "At the Earth's Core" was based on an Edgar Rice Burrough's novel. "A Victorian era scientist and his assistant take a test run in their Iron Mole drilling machine and end up in a strange underground labyrinth ruled by a species of giant telepathic bird and full of prehistoric monsters and cavemen." (STEAMPUNK DELIGHT)