I think the Garden of Eden is a figure of a state of being more than a place, just like the serpent is a figure of the Devil. The Garden of Eden would be a representation of the state of man living on this earth with the preternatural graces of immortality and communion with God. It is remarkably similar to how paradise is described in Revelation, and we know there will be a new earth, so basically the Garden of Eden is like a precursor to being in heaven on earth.
That does not agree with Church teaching:
"Real History
"The argument is that all of this is real history, it is simply ordered topically rather than chronologically, and the ancient audience of Genesis, it is argued, would have understood it as such.
"Even if Genesis 1 records God’s work in a topical fashion, it still records God’s work—things God really did.
"The Catechism explains that “Scripture presents the work of the Creator symbolically as a succession of six days of divine ‘work,’ concluded by the ‘rest’ of the seventh day” (CCC 337), but “nothing exists that does not owe its existence to God the Creator. The world began when God’s word drew it out of nothingness; all existent beings, all of nature, and all human history is rooted in this primordial event, the very genesis by which the world was constituted and time begun” (CCC 338).
"It is impossible to dismiss the events of Genesis 1 as a mere legend. They are accounts of real history, even if they are told in a style of historical writing that Westerners do not typically use.
"Adam and Eve: Real People
It is equally impermissible to dismiss the story of Adam and Eve and the fall (Gen. 2–3) as a fiction. A question often raised in this context is whether the human race descended from an original pair of two human beings (a teaching known as monogenism) or a pool of early human couples (a teaching known as polygenism)."
Peace,
Ed