The place of Enlightenment of the Bodhisatta (under the Maha Bodhi tree) is the real place where the Samma Sambuddha was “born”. That is the place where the transformation from a Bodhisatta to a Samma Sambuddha actually happened. So in that sense, Lord Buddha was “born” at the foot of the Maha Bodhi tree.
Lord Buddhas are not “born” everywhere. There is a special place for it where all the factors are perfect for a Bodhisatta to become a Samma Sambuddha. That special place is located only in our cakkavala among the dasa sahassi lokadhatu (ten thousand world systems). That special place is located on Jambudipa (i.e, our Earth) in the madhya deshaya (middle country).
That special place in called the madhya mandala (middle region) or the Bodhi mandala. This is where the real Maha Bodhi tree was born spontaneously due to the power of the Bodhisttva’s Paramithas. It’s in Anuradhapura, Sri Lanka and the Maha Bodhi tree is known as Jaya Sri Maha Bodhiya (I am sorry to say but it’s NOT in Bodh gaya, India).
Not only our Bodhisatta, but all Bodhisattvas attains Buddhahood AT THAT SAME PLACE. For example, when the present Buddha Sasana will be over, this Maha Bodhi tree will disappear on its own. And when the Maitreya Bodhisattva is about to come to the human realm, a new Maha Bodhi tree will appear spontaneously AT THAT SAME PLACE (in Anuradhapura, Sri Lanka). He will also attain Buddhahood at that place only.
The Maha Bodhi tree and the relics of Lord Buddha are very very special. They are created from pure Buddha Energy and CAN NOT be destroyed by anyone or anything in the entire existence! (After the end of the Buddha Sasana, they will vanish automatically)
