At one time, that whole area was a rain forest, and it has been suggested that is when the Sphyx was built....
Who made this suggestion?
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Where would you find a tropical rainforest Brazil or Egypt?
from Answers.com
Brazil, you need to use common sense. Rain forests grow in hot areas near the equator that have no dry season. Egypt is always dry so that can't be it but Brazil is near the equator and barely ever is dry so Brazil must be the answer.