Of the Seven Wonders of the ancient world, the Great Pyramid of Giza survives to this day and the fate of five others is documented. But what became of the Hanging Gardens of Babylon has remained a mystery; some scholars aren’t certain they even existed. But ISIS’s destruction of a shrine on the ancient site of Nineveh may have revealed the key to that mystery. Or perhaps not. The connection involves a chain of historical references that may not hold up – but Noah Charney explains that chain and how it might be plausible.