Eden.
In the beginning God created the earth and it was all good in His eyes. His Kingdom was extended and He needed someone to govern the colonized Kingdom animals weren't fit enough to govern, therefore He created a human being after His likeness and image, for them to rule and govern as He governs in Heaven. Because all Kingdoms needs headquarters where they meet, God created a Capital City of the Earth which was the Garden of Eden and He placed a man there, not for many things but for them to meet and engage! The main purpose of Eden was to strengthen the relationship of God and man. Eden it was the atmosphere that man and God confided and engaged intimately. The first meeting place of the theos and anthropos was Eden. Hence a man was placed there to cultivate and work it, as the child of the meeting is essential for it is where we engage with our Almighty God.