Hell is sometimes (in KJV and in some creeds), the translation of hades the hebrew equivalent of sheol: place of the dead.
The place of the dead is the grave, it is the unseen place spoken of, the hidden place inside the earth.
Luke 16 is "hades".
1...Gehenna (equivalent of valley of Hinnom in hebrew) is the greek term for the place of eternal torment.
2...This is also called: "lake of fire".
1...This is what the Pagan Greeks believed; not what Israel or the Christians believed. Again, we are to have nothing to do with Pagan beliefs. We must look elsewhere for our answers, not to Pagan understanding.
2...Actually, the lake of fire is the end-all of this creation, heaven and earth and all the evil therein which, also, includes Satan, his followers and those that believe not. See 2 Peter 3:10:
"But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up."
It is the eternal (without end) destiny of Satan, the false prophet, the beast, and those whose names are not written in the book of life.