I am kind of halfway with you, in the sense I think the garden is a bit like a garden with supernatural ingridients, very similar to how new Jerusalem in the book of Revelation, that is magical and from heaven, but yet earthly and allows earthly beings, such as birds, animals, trees and Adam and Eve to dwell and live there, where inside it is nice and cosy and full of life, where God walks among them, but outside is darkness .i.e night time, thorns, ravenous beasts, temperature extremes, sharp rocks etc