Then Jonah prayed unto the LORD his God out of the fish’s belly, And said, I cried by reason of mine affliction unto the LORD, and he heard me; out of the belly of hell cried I, and thou heardest my voice.(Jonah 2:1-2) KJV
Jonah drowned and died. According to his testimony his soul went to hell, his body was swallowed by a fish. In hell he cried out to the Lord and he was resurrected in the fish’s belly. Chapter 2 of Jonah includes a first-hand eyewitness account of the internal structure of the earth. It gives us the clues we need to assemble the pieces of our spherical hollow earth model (SHEM).
Jonah gives us direct observation of the pillars of the earth. Direct observation is also known as empirical. The pillars of the earth aren’t allegorical, metaphorical or theoretical, they’re empirical.