Second biggest city of each belgian province

Guess the world's twenty most-traded currencies, and the countries or special regions that issue them.

20 random countries have been removed from the map of the world! Can you identify them in 3 minutes?

Click on every square of the world map which contains an urban agglomeration with a population of at least 10 million.

Drag the flag onto the correct country. Careful, though! One wrong move and the game ends.