Four kinds of trees.  And four rivers.  I'm not going to quote this entire passage.  Get a Bible and follow  in  Gen. 2: 10-14.  First Gen. 2:10  "And a river went out of Eden to water the garden; and from thence it was parted and became into four heads."

1.  Pison: Compassing all of Havilah.  Where there was gold and other precious stones.
2.  Gibon: Compassing all of Ethiopia.
3.  Hiddekel: Going toward the east of Assyria.
4.  Euphrates.

I mention these rivers to bring further attention to the validity of God's word as a historical document.  The names of some of the rivers and countries have finally been recognized by historians as real places.  We recognize their names.  They were real.  They are real.  Seventy years ago, the stories in Genesis were derided by many historians.  No more.  Archaeologists now keep a Bible in their hip pocket as a reference.  It is one of the oldest written documents that we have.  And every few years, another Biblical site is validated by archeology.

Eden was the source of the four rivers.  Sounds like an idyllic  place with natural springs that flow out to the four rivers.