Other mentions of the Garden of Eden in the Bible Post - Flood.
Genesis 28:12 - "And he dreamed, and behold, there was a ladder set up on the earth, and the top of it reached to heaven. And behold, the angels of God were ascending and descending on it!"
Genesis 11:4 - "Then they said, “Come, let us build ourselves a city and a tower with its top in the heavens, and let us make a name for ourselves, lest we be dispersed over the face of the whole earth.”
They weren't trying to Build a tower to the Moon.. They were trying to Build a tower 45 Cubits High, or high enough to reach the Garden of Eden.
Enoch Ascended to Heaven.. But Jesus said, no one had ascended to Heaven, before him. It was not The Same Heaven..
In the Second Book of Enoch, Third Heaven is described as a location "between corruptibility and incorruptibility" containing the tree of Life.
At the end of the Millenium, the Garden of Eden and Paradise will again be joined - revelation 21:3 " And I saw the holy city, new Jerusalem, coming down out of heaven from God, made ready as a bride adorned for her husband"
Its all there if you are willing to stop being so pessimistic, and just expand your horizons.
In order to answer your question, you first have to understand the Heavens & the Earth