The answer is: Haran

Gen 10:8-10

In the sweeping narrative of Genesis 10, we meet a figure named Nimrod, often described as a mighty warrior and a king representing the ambitious spirit of humanity post-Flood. His name evokes images of prowess and possibly arrogance, foreshadowing the legendary tower of Babel that would come soon afterward. Interestingly, Nimrod was affiliated with cities like Babel, Erech, and Akkad, which showcased early urbanization in ancient Mesopotamia.

What's fascinating about Haran, the city mentioned in your answer, is that it holds both cultural and biblical significance beyond Nimrod’s kingdom. In ancient times, Haran was a significant trade hub and served as one of the stops along trade routes. Also, Haran plays a key role in the tale of Abram (later Abraham), who in Genesis 11 settles there before journeying to Canaan.

Trivia alert: The name "Haran" in Hebrew can mean "to be in a state of distress" or "to be excited," which might reflect the rollercoaster of trials and revelations that this city experienced in biblical history.

Moreover, some scholars link Nimrod’s cities to a larger commentary on the tension between human endeavors and divine will, paving the way for an era where we see the development of nations with both triumphs and conflicts. Highlighting Haran's absence from Nimrod's kingdom reminds us that even among powerful rulers, there are places untouched by their reign—a glimmer of hope and diversity in a story filled with ambition and power plays.