If the Garden of Eden is spiritual, did it exist on Earth?

The original Garden of Eden was on Earth, because Adam and Chava were created as immortals and G-d was dwelling together here with them. If they had not sinned, the state of ultimate spiritual bliss would have always existed in the physical world, as G-d desired it to be. Their sin brought death into the world, by which the soul is separated from the body. Until the culmination of the future Messianic Era with the Resurrection of the Dead, when the world will reach its ultimate state of perfection (may it come speedily in our days!), the souls of the departed must suffice with receiving their reward in the levels of the “Garden of Eden” as it exists in the spiritual worlds.