On page 85 of Beyond Death’s Door, Dr. Rawlings writes patients who described hell said, "... this place seems to be UNDERGROUND or WITHIN THE EARTH in some way."
Scientist and Bible teacher, Henry Morris also agrees the Bible plainly teaches that hell is in this earth:
"So far as we can tell from Scripture, the present hell, is somewhere in the heart of the earth itself. It is also called 'the pit'(Isa. 14:9, 15: Ezek. 32:18-21) and 'the abyss'(Rev. 9:2)...
The writers certainly themselves believed hell to be real and geographically 'beneath' the earth's surface...
To say this is not scientific is to assume science knows much more about the earth's interior than is actually the case. The great 'pit'[hell] would only need to be about 100 miles or less in diameter to contain, with much room to spare, all the forty billion or so people who have ever lived, assuming their 'spiritual' bodies are the same size as their physical bodies."
(Henry M. Morris, The Bible Has the Answer, p. 220)
The Birmingham News, April 10, 1987 had an article entitled "Earth's Center Hotter Than Sun's Surface, Scientists Say". The article stated that scientists have recently discovered, "THE EARTH'S INNER CORE HAS A TEMPERATURE OF OVER 12,000 DEGREES FAHRENHEIT!"