Moscow, (Russian: Moskva), Russia, the nation's capital and largest city. It lies on both sides of the Moscow River, in west-central European Russia.
Shanghai, China, the nation's largest city and principal seaport, and one of the most populous cities in the world.
There's more to Beijing than meets the eye at street-level. Under bustling sidewalks is a subterranean city with its own classrooms, movie theater and restaurants.