Larsen Puzzle The European Union (EU), 70 pieces. A political map of Europe and the European Union featuring the names of countries, cities, rivers, lakes, islands, and seas. Countries outside the European Union are colored blue to distinguish them from EU members. There is a question mark next to the flags of the countries that use the Euro currency. Since all puzzle pieces look similar, you need to read the names and pay attention to the colors to assemble the puzzle.