Student teams from Canada, Poland, and the United States have progressed to Wednesday's final round in the 2009 National Geographic World Championship.
Top competitors in national geography bees, such as the one held here at NatGeo headquarters in May, earned the right to represent their countries at the world competition in Mexico City.
Learn more on NatGeo NewsWatch, read about this author's humiliation in Geographic Bee rehearsals by Alex Trebek, or test your own geographic smarts in the GeoBee Challenge!
Photographs by Tyrone Turner