When the early saints moved down to Missouri Joseph Smith conveniently learned that it was a very cool place. Jesus was going to do some millennial ruling from there and, believe it or not, Adam, the father of mankind, would also be making a return visit! The exact location is called Adam-ondi-Ahman (Adamic for "Adam in the presence of God") but before that it was just good old Spring Hill.
"Spring Hill is named by the Lord Adam-ondi-Ahman, because, said he, it is the place where Adam shall come to visit his people, or the Ancient of Days shall sit, as spoken of by Daniel the prophet." (D&C 116:1)
Actually, before that it was the Adams and Eves family stopping grounds.
"Three years previous to the death of Adam, he called Seth, Enos, Cainan, Mahalaleel, Jared, Enoch, and Methuselah, who were all high priests, with the residue of his posterity who were righteous, into the valley of Adam-ondi-Ahman, and there bestowed upon them his last blessing." (D&C 107:53)
No Eden here, try Missouri.
Yes, that means the Garden of Eden was in North America and not somewhere in the vicinity of the Middle East. Here's what Spring Hill/Adam-ondi-Aham/Almost Eden looks like.
I always had a hard time with believing this story. Adam, as in an actual historical non-literary first man created by God 6000 years ago? Missouri, really? God's mentioning mountains, I don't think this can be the right place. What about the whole scientifically-based "out of Africa" thing? And why's Adam coming back for the Second Coming anyway? Won't that steal some of Jesus' thunder? What other big names are billed for the event? If I get tickets for Adam's Blessing will I still be able to catch the Destruction of Gog and Magogs? I hear that show's gonna kick ass.
And how about the Adam-ondi-Ahman temple? Is that venue up yet? I can't wait! I hear it's gonna be sweet!