6 challenges
Geography
Rank countries, lakes, mountains, and landmarks by the measurements that define them. Each challenge turns scale, distance, area, height, or depth into a quick map of how places really compare.
Great Lakes by Surface Area
A familiar outline on a map can be deceptive: surface area tells a different story from depth or volume.
Selected Countries by Total Area
Political maps make neighboring countries look deceptively similar. Compare the latest total-area figures in the CIA World Factbook archive.
North American Rivers by Length
These major North American rivers cross very different landscapes, and their familiar names can hide surprising differences in length.
Major U.S. Cities by 2020 Population
These are city populations inside official municipal boundaries, not the much larger populations of their metropolitan areas.
Selected U.S. State High Points by Elevation
Compare the official elevations of the highest point in each selected state—not the states' average elevations.
Selected National Park Service Units by Acreage
This comparison uses each National Park Service unit’s total reported acreage; for Denali, that denominator includes both the park and preserve.
No challenges match this filter yet.