Where were the tree of life and the tree of knowledge of good and evil located in the garden of Eden?
The tree of life was in the midst of the garden of Eden. The tree of the knowledge of good and evil was located someplace just a little ways away from it, within the same garden. These are the two particular trees noted in the account.
Les explains that there were two particular trees in the garden. The tree of life was in the midst of the garden, and the tree of the knowledge of good and evil was someplace just a little ways away from it. He notes that after Adam sins, the tree of life disappears from the scriptural account, not mentioned again until Revelation, where it will enhance eternal life in the new heaven and new earth. Had Adam been able to partake of the tree of life, he would have lived forever. But the tree of the knowledge of good and evil is the one Les says we better learn the most about.
And out of the ground made the LORD God to grow every tree that is pleasant to the sight, and good for food; the tree of life also in the midst of the garden, and the tree of knowledge of good and evil.