Despite the name this is not the same as a hollow earth.

It imagined another world in the center of a hollow earth.

It might have been a thousand miles high, the core of a hollow Earth.

A stone model of the hollow earth caps the memorial.

We live inside a hollow earth, enclosed by the terrestrial surface.

He supported the idea of a hollow Earth, but without interior shells or inner sun.

He believed in the theory of the hollow earth, Hohl-weltlehre.

The others have all slithered in from one or another flying saucer base inside the hollow earth.

A ticket would cost $9,999 for a seat on an exploration team to locate the polar entrance to the hollow earth.

"I'll not believe a hollow earth," Say seepticals of doubtful birth.