In which country are the ruins of Uruk?

Uruk was one of the most important cities (at one time, the most important) in ancient Mesopotamia. According to the Sumerian King List, it was founded by King Enmerkar sometime around 4500 BCE. Located in the southern region of Sumer (modern day Warka, Iraq), Uruk was known in the Aramaic language as Erech which, it is believed, gave rise to the modern name for the country of Iraq (though another likely derivation is Al-Iraq, the Arabic name for the region of Babylonia).