If you meant "western" in the sense of "most European", then it's probably Berlin.
Otherwise, if you meant "western" in the sense of "most cosmopolitan", then New York would be the one.
Carson City Nevada
The Western most city in Romania is Deta.
western
Cape Wrangell in Attu Island, Alaska, is the most western point in the United States.
western
western
Kabul
mumbai
Maarianhamina.
brest
Western
Most of the US is located in the western hemisphere. The easternmost point of the US is in West Quoddy Head, Maine.