More SciFi stories. Imagine Earth being a giant mechanical/electrical disk & a Terrarium & Aquarium at the same time + firmament above. Edge is Antarctica, center of the Earth would be North Pole. There's portals/doors to other realms on the Edges. Not a full of story of course.

Read Enoch 33-36, might explain some things. Admiral Byrd would've explain it in other words, more understandable to our time.

Basically, Enoch and Admiral Byrd tell the same story, just Enoch tells the story in more details.