GeotchaA geography quiz on a real globe
Largest city of each 30° band of longitude
12 cities, each one drawn on a satellite globe. Name it when it lights up, find it when you are given its name, or type every one you can remember in Name all.
Free to play, with no account needed. What you miss comes back for review until it sticks.
The cities
- 1Guangzhou43 M
- 2Shanghai42.3 M
- 3Delhi36.9 M
- 4Mexico City25.6 M
- 5Cairo23.2 M
- 6São Paulo22.7 M
- 7New York City22.6 M
- 8Lagos21.9 M
- 9London15.4 M
- 10San Francisco7.7 M
- 11Sydney5.3 M
- 12Honolulu542 k
Population of the metro area: the city and the places continuously built up around it, as Thomas Brinkhoff’s Major Agglomerations of the World (citypopulation.de) counts them from censuses projected to 1 January 2026, the list most rankings use. It covers every agglomeration of 1 million or more; a smaller city ranks by its GHSL urban centre (2025), or by its city-proper figure where GHSL’s centre is far larger than the list allows. A city inside another city’s metro area (Giza in Cairo’s, Pretoria in Johannesburg’s) is not ranked on its own. One per group: the largest city of each 30° band of longitude by this measure, then ranked together. Bands of longitude 30° wide, from the prime meridian: 0°–30° E, 30°–60° E, … and 0°–30° W, … Sources: GeoNames (CC BY 4.0), GHSL UCDB R2024A (CC BY 4.0), Thomas Brinkhoff: Major Agglomerations of the World, citypopulation.de, Wikidata names (CC0).
More of the world
- Largest city of each 10° band of latitude
- Largest country on each continent
- Most populous region of each country, top 100
- Highest peak of each country
- Largest lake on each continent
- Longest river on each continent
- Largest island on each continent
- Largest city on each continent
- Most populous country on each continent
- Highest peak on each continent