I wonder why fundamentalists are so keen to believe in a literal seven-day creation and yet do not campaign against space flight (in case someone crashes into the sky-dome and cracks it) or organize recruitment drives for the Flat Earth Society. If you really want to use the Bible to derive cosmology then it seems the way to go…So the dilemma remains: if one wants to be a thoroughbred fundamentalist one really ought to believe that the sky is solid (with heaven the other side of it) and that the earth is flat (with Sheol/Hades literally below it). As an aside, I wonder how many fundamentalists would be so keen on “Big Oil” if they thought they might accidentally drill down into Hades!
If such a stance does not sound attractive to you, and you are a Christian, then you are in luck. There is another option, namely historic Christianity, in which, as Robin points out, “the likes of Aquinas and Calvin” said “that God accommodated himself in his communications with humanity.”