I can't remember who recommended this to me, it was not that long ago. Can't find it with search. But I hunted down an anthology with Howard Waldrop/Steven Utley Black as the Pit, from Pole to Pole.
Wonderful, highly original story. I am not versed enough in all these hollow earth stories, to recognize all the worlds. But the idea, to put them all together and sending the Frankenstein Monster through them from the north to the south was great.