How do we know that Hell is located in the Earth? Does the Bible say this?
Every time the BIble discusses the holding place for the spirits of unbelievers, it speaks of a place "in the earth" and "below" us. For example, consider this OT reference to the place of the ungodly after death (called Sheol in the OT):
Num. 16:30 “But if the LORD brings about an entirely new thing and the ground opens its mouth and swallows them up with all that is theirs, and they descend alive into Sheol, then you will understand that these men have spurned the LORD.”
Num. 16:31 As he finished speaking all these words, the ground that was under them split open;
Num. 16:32 and the earth opened its mouth and swallowed them up, and their households, and all the men who belonged to Korah with their possessions.
Num. 16:33 So they and all that belonged to them went down alive to Sheol; and the earth closed over them, and they perished from the midst of the assembly.
Notice these men were sent to Hell, and they went "down" and the earth "closed over them." These are clear indications that Hell is below our feet. Likewise, every other reference to death and the afterlife in the Old Testament indicates that the holding place for the dead is below our feet in the earth.
In the New Testament, Jesus was said to go down when He went into the grave:
Eph. 4:7 But to each one of us grace was given according to the measure of Christ’s gift.
Eph. 4:8 Therefore it says,
“ WHEN HE ASCENDED ON HIGH,
HE LED CAPTIVE A HOST OF CAPTIVES,
AND HE GAVE GIFTS TO MEN.”
Eph. 4:9 (Now this expression, “He ascended,” what does it mean except that He also had descended into the lower parts of the earth?
Eph. 4:10 He who descended is Himself also He who ascended far above all the heavens, so that He might fill all things.)
Jesus descended into the lower parts of the earth, Paul says.
Remember, scientists might dispute our Biblical view, but in reality they have no idea what exists in the center of the earth. We've never penetrated more than a few miles into the Earth's crust. Based on the word of God, Hell (or Hades) is below our feet.