Top 50 Cities of Europe by Population

Name the three countries which intersect in each of these maps.

Difficulty level: impossible and mean-spirited. Can you guess these countries based on a partial view of their flag?

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.