The Seven Wonders of the Ancient World are all incredible structures from the classical era. Yet, while six of these monuments have been located, one has never been found, leading some to argue that it was a fictional creation. That wonder is the infamous Hanging Gardens of Babylon, a lush paradise that would have been unlike anything else on Earth. Unfortunately, details surrounding the gardens are sparse, which has left experts stumped for centuries. But a recent found by researchers at Oxford University may have finally uncovered a reason for the lack of evidence.