GeotchaA geography quiz on a real globe

25 largest cities in the Tagus basin

25 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

  1. 1Madrid7 M
  2. 2Alcalá de Henares203 k
  3. 3Torrejón de Ardoz144 k
  4. 4Rivas-Vaciamadrid103 k
  5. 5Cáceres97 k
  6. 6Toledo87 k
  7. 7Valdemoro86 k
  8. 8Talavera de la Reina84 k
  9. 9Guadalajara82 k
  10. 10Collado Villalba67 k
  11. 11Aranjuez63 k
  12. 12Santarém62 k
  13. 13Arganda del Rey60 k
  14. 14Colmenar Viejo59 k
  15. 15Tres Cantos55 k
  16. 16Covilha52 k
  17. 17Monsanto50 k
  18. 18Tomar41 k
  19. 19Plasencia40 k
  20. 20Arroyomolinos38 k
  21. 21Galapagar37 k
  22. 22Azuqueca de Henares36 k
  23. 23Castelo Branco34 k
  24. 24Torres Novas34 k
  25. 25Navalcarnero33 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; below that, a city ranks by its agglomeration in the United Nations’ World Urbanization Prospects 2018 (every one of 300,000 or more, from national censuses), and a smaller city by its city-proper figure. A city inside another city’s metro area (Giza in Cairo’s, Pretoria in Johannesburg’s) is not ranked on its own. The Tagus basin: what lies inside the river basin’s outline, by each item’s point (a lake’s centre, a river’s mouth, a summit). 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).

On the map

Map of 25 largest cities in the Tagus basin, 25 cities: each one marked on the globe

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