BABYLON will be made a burnt mountain thrown into Euphrates.
BABYLON shalt be DESOLATE FOR EVER!

Jeremiah:51:24-26: "And I will render unto Babylon and to all the inhabitants of Chaldea all their evil that they have done in Zion in your sight, saith the LORD."
v25: "Behold, I am against thee, O destroying mountain, saith the LORD, which destroyest all the earth: and I will stretch out mine hand upon thee, and roll thee down from the rocks, and will make thee a burnt mountain."
v26: "And they shall not take of thee a stone for a corner, nor a stone for foundations; but thou shalt be desolate for ever, saith the LORD."

AT BABYLON shall FALL the SLAIN of ALL THE EARTH!
How would this be true? Unless BABYLON becomes the LAKE OF FIRE & BRIMSTONE where all those not found in the book of life shall be thrown into it.
(see later comments.)

Jeremiah:51:49: "As Babylon hath caused the slain of Israel to fall, so at Babylon shall fall the slain of all the earth."

BABYLON shall be DESOLATE FOR EVER and shall SINK and shall not rise as the book is cast into EUPHRATES.

Jeremiah:51:60-64: "So Jeremiah wrote in a book all the evil that should come upon Babylon, even all these words that are written against Babylon."
v61: "And Jeremiah said to Seraiah, When thou comest to Babylon, and shalt see, and shalt read all these words;"
v62: "Then shalt thou say, O LORD, thou hast spoken against this place, to cut it off, that none shall remain in it, neither man nor beast, but that it shall be desolate for ever."
v63: "And it shall be, when thou hast made an end of reading this book, that thou shalt bind a stone to it, and cast it into the midst of Euphrates:"
v64: "And thou shalt say, Thus shall Babylon sink, and shall not rise from the evil that I will bring upon her: and they shall be weary. Thus far are the words of Jeremiah."

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IF there will be a new heaven and a new earth...how could IT be TRUE THAT BABYLON is going to be DESOLATE FOREVER?

Revelation:21:1: "And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea."

I believe the reason is that the new heaven and new earth is not this earth anymore...because this first earth will be passed away without sea.
This first earth will have a LAKE OF FIRE & BRIMSTONE which burns forever DAY&NIGHT!

Note that the first time the LAKE of FIRE burning with brimstone was mentioned after JESUS returned with HIS Saints and BABYLON JUDGED and the BEASTs were cast alive into it
So LAKE OF FIRE is BABYLON?

Revelation:19:20: "And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone."

Then after 1000years the devil was cast into this LAKE OF FIRE to torment them FOREVER and so how could GOD use this place to create as a NEW ONE?

Revelation:20:10: "And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever."

Even Death and Hell was cast into this LAKE of FIRE? Could this means that the LAKE grew LARGER?

Revelation:20:14: "And death and hell were cast into the lake of fire. This is the second death."

SO ALL THE SLAIN OF THE EARTH as mentioned in Jeremiah51:49 above was fulfilled when Whosoever not found in the book of life was cast into this LAKE OF FIRE which is BABYLON which is DESOLATE FOREVER?

Revelation:20:15: "And whosoever was not found written in the book of life was cast into the lake of fire."

SELAH