Moscow

Moscow is the capital city of the Russian nation-state on Earth, and is located in the European portion of Russia. For most of the 20th century, the city was the capital of the Soviet Union, which Russia was part of at the time.

Pavel Chekov once remarked that the Garden of Eden was located outside Moscow, and that leaving made Adam and Eve very sad.

In an alternate time line by 1944 the Nazis, with alien assistance, were able to capture Moscow by 1944. Surviving Russian soldiers were planning a counterattack when the Enterprise was pulled into Earth's past.