Biggest American Cities that start with B on a Map

How many of the world's 50 most populous urban areas can you name?

Name the world's 100 most populous urban areas - with the help of a map!

Can you name every city in the world whose urban area has more than one million people - with the help of a map?

For each time zone, can you name the three biggest cities by urban population? When you guess the city, it will appear on the map.