Directions have been given in the bible in relation to the garden.In Genesis 2:13(KJV) Ethiopia is mentioned in this regard.Scientifically paleontologists have excavated six million years of life and conclude that Ethiopia is the scientific location of human origin, a scientifically true Garden of Eden.
If you read verse 14, the Euphrates and Tigris rivers are also mentioned as flowing in the garden, running along the East side.
A quick Google guide tells me that Tigris and Euphrates are "From sources in the Taurus mountains of eastern Turkey they flow by/through Syria through Iraq into the Persian Gulf".
So it seems like Eden was a big place..and if the present names of the rivers still meant the same as in the olden days, then Eden was in Asia..and maybe extended to Ethiopia as the other four rivers mentioned in the verse can be found there.
We cant use science(fossils) with the creation theory though