Giants are one of the inhabitants in the Hollow Earth.
At the time of the Mythical Land of Atlantis when the
inhabitants reached the peak of knowledge in
advanced technology, they forgot GOD, the Prime Creator
believing they were superior. That was the cause in the
fall of Atlantis, it submerged to the deepest
of the ocean. Fortunately, the righteous escaped and
found refuged to the Inner Earth. 
