The Hanging Gardens of Babylon are traditionally associated with a site approximately 50 kilometers south of Baghdad, Iraq.
Babylon was one of the great cities of ancient Mesopotamia, located near the Euphrates River in what is now central Iraq. The city flourished particularly under King Nebuchadnezzar II, who ruled from 605 to 562 BCE. Later Greek and Roman writers described the Hanging Gardens as a spectacular series of elevated terraces filled with trees, flowers, and water.
The gardens are traditionally counted among the Seven Wonders of the Ancient World. However, archaeologists have not found conclusive evidence that they existed at Babylon, and the earliest detailed Babylonian records do not clearly mention them. Some modern historians have proposed that the descriptions may actually refer to elaborate gardens at Nineveh, near modern Mosul.
Baghdad is therefore the standard quiz answer because the traditional Babylonian location lies south of the modern Iraqi capital. The distance is approximate and varies depending on whether one measures from Baghdad to ancient Babylon or to the archaeological site.