Each dot represents a city with population > 1 million. To turn the dot green, guess any 1M city within 1,000 kilometers.
UrbanArea population according to citypopulation.de (ref. date 1.1.19)
Dot size depends on population
Dot colours: blue represents a capital, dark blue an agglomeration including a capital, red represents an agglomeration without a main city, white on the circumference represents a city with no other 1M city within 1,000 km
Auckland, Perth, Sydney, Melbourne, Honolulu, Seattle, Las Vegas, St Louis, New York, San Juan, Monterrey, Guatemala City, Bogota, Lima, Manaus, Teresina, La Paz, Sao Paulo, Cordoba, Conakry, Accra, Kaduna, Kinshasa, Kisangani, Addis Ababa, Mombasa, Harare, Port Elizabeth, Antananarivo, Malaga, Naples, The Ruhr, Minsk, Samara, Almaty, Novosibirsk, Konya, Tehran, Riyadh, Karachi, Chennai, Chandigarh, Khulna, Hohhot, Dalian, Shaoyang, Taipei, Nagoya, Manila, George Town, Surakarta.