Hell and heaven are in the same 'place': God's presence.
For those in Christ, God's presence is heaven.
For those not in Christ, God's presence is hell.
Both sets of persons are spiritual beings, and therefore will never expire. The first set will experience heaven for ever, the second, hell forever.
Hell is therefore something people do to themselves: God doesn't send them to a physical fire (for in the spiritual realm there is no physicality), but is Himself that fire.
It is God's holiness that constitutes hell for the unsaved in His presence. For such presence was even overwhelming for the righteous prophets who fell down as though they were dead during visions they had.