Final answer:
Mesopotamia was located in modern-day Iraq and was known as the cradle of civilization.
Step-by-step explanation:
The present-day country located where ancient Mesopotamia once existed is Iraq. Mesopotamia was an ancient region in the eastern Mediterranean, known as the cradle of civilization. It is in the area of modern-day Iraq, and it was home to some of the earliest civilizations in human history, such as the Sumerians, Babylonians, and Assyrians.
Learn more about Ancient Mesopotamia