The ends of the 4 Christian hells, Part 2 (short version)

Jesus warned about Gehenna, worms and fire in Mark 9:43–48,

And if your hand should ever be snaring you, strike it off. It is ideal for you to be entering into life maimed, rather than, having two hands, to come away into Gehenna, into the unextinguished fire ⁴⁴ where their worm is not deceasing and the fire is not going out. ⁴⁵ And if your foot should be snaring you, strike it off. For it is ideal for you to be entering into life maimed or lame, rather than, having two feet, to be cast into Gehenna, into the unextinguished fire, ⁴⁶ where their worm is not deceasing and the fire is not going out. ⁴⁷ And if your eye should be snaring you, cast it out. It is ideal for you to be entering into the kingdom of God one-eyed, rather than, having two eyes, to be cast into the Gehenna of fire, ⁴⁸ where their worm is not deceasing and the fire is not going out.

Concordant Literal New Testament - CLNT

Christianity says that the valley of Gehenna is hell and the lake of fire, and that the judgment of Gehenna/hell/lake of fire is everlasting. But this miraculous morphing of the valley of Gehenna into hell and the lake of fire cannot be found in the Scriptures. And not one single judgment in the Scriptures is everlasting. Even Satan's time in the lake of fire is limited to "the eons of the eons" (Revelation 20:10)

They err, greatly.

Gehenna, an actual valley outside of Jerusalem, will end when this current earth ends. This takes place at the end of the next eon, after the millennium,

And I perceived a great white throne, and Him Who is sitting upon it, from Whose face earth and heaven fled, and no place was found for them.

Revelation 20:11 - CLNT

The apostle Peter gives us more details concerning this event,

Earth, in the future

Yet the heavens now, and the earth, by the same word, are stored with fire, being kept for the day of the judging and destruction of irreverent men. ⁸ Now of this one thing you are not to be oblivious, beloved, that one day is with the Lord as a thousand years and a thousand years as one day. ⁹ The Lord is not tardy as to the promise, as some are deeming tardiness, but is patient because of you, not intending any to perish, but all to make room for repentance. ¹⁰ Now the day of the Lord will be arriving as a thief, in which the heavens shall be passing by with a booming noise, yet the elements shall be dissolved by combustion, and the earth and the works in it shall be found. ¹¹ At these all, then, dissolving, to what manner of men must you belong in holy behavior and devoutness, ¹² hoping for and hurrying the presence of God's day, because of which the heavens, being on fire, will be dissolved, and the elements decompose by combustion! ¹³ Yet we, according to His promises, are hoping for new heavens and a new earth, in which righteousness is dwelling.

2 Peter 3:7–13 - CLNT

So, there it is, the end of Gehenna, the second Christian "hell."
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Image: Melting earth on Pikist