“木桶饭”地点数量≥200的地级行政区 Prefectures with ≥200 "Mutongfan" sites

Name all 50 states in the USA. Easy, right?

With the help of a map, can you name the countries which existed during the Revolution of 1848?

Twenty three cities have hosted the Summer Olympics at least once. Can you click them all without making any mistakes?

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