The Lost Books Of Eden
Chapter XI.
6 But Seth and his children did not like earthly work, but gave themselves to heavenly things; for they had no other thought than praises, doxologies, and psalms unto God.
7 Therefore did they at all times hear the voices of angels, praising and glorifying God; from within the garden, or when they were sent by God on an errand, or when they were going up to heaven.
8 For Seth and his children, by reason of their own purity, heard and saw those angels. Then, again, the garden was not far above them, but only some fifteen spiritual cubits.
9 Now one spiritual cubit answers to three cubits of man, altogether forty-five cubits.
10 Seth and his children dwelt on the mountain below the garden; they sowed not, neither did they reap; they wrought no food for the body. not even wheat; but only offerings. They ate of the fruit and of trees well flavoured that grew on the mountain where they dwelt.
11 Then Seth often fasted every forty days, as did also his eldest children. For the family of Seth smelled the smell of the trees in the garden, when the wind blew that way.

Chapter XVII.
13 Then the elder said to him, "Marvel not, 0 my son; we live in the land north of the garden, which God created before the world. He would not let us live there, but placed us inside the garden, below which ye are now dwelling.

Originally posted by defcon5
As others have mentioned about the book of Enoch, the Garden of Eden is not longer on the Earth but was gradually lifted up into the heavens. There is additional support for this outside the Book of Enoch in other Pseudopigraphal texts, which are based on Jewish tradition.

The Lost Books Of Eden
Chapter XI.
6 But Seth and his children did not like earthly work, but gave themselves to heavenly things; for they had no other thought than praises, doxologies, and psalms unto God.
7 Therefore did they at all times hear the voices of angels, praising and glorifying God; from within the garden, or when they were sent by God on an errand, or when they were going up to heaven.
8 For Seth and his children, by reason of their own purity, heard and saw those angels. Then, again, the garden was not far above them, but only some fifteen spiritual cubits.
9 Now one spiritual cubit answers to three cubits of man, altogether forty-five cubits.
10 Seth and his children dwelt on the mountain below the garden; they sowed not, neither did they reap; they wrought no food for the body. not even wheat; but only offerings. They ate of the fruit and of trees well flavoured that grew on the mountain where they dwelt.
11 Then Seth often fasted every forty days, as did also his eldest children. For the family of Seth smelled the smell of the trees in the garden, when the wind blew that way.

Chapter XVII.
13 Then the elder said to him, "Marvel not, 0 my son; we live in the land north of the garden, which God created before the world. He would not let us live there, but placed us inside the garden, below which ye are now dwelling.

For those who are in here already bashing on Christianity, maybe you should think about the fact that these traditions predate Christianity by hundreds, if not thousands of years, they are Jewish traditions.