Which cities in Brazil are megacities?

Brazil has three megacities: São Paulo, Rio de Janeiro, and Brasília. These cities have populations of over 10 million people and are home to a significant portion of the country's economic activity.

- São Paulo: São Paulo is the largest city in Brazil and South America, with a population of 12.4 million people. It is the main economic center of the country, and is home to many large corporations and financial institutions.

- Rio de Janeiro: Rio de Janeiro is the second largest city in Brazil, with a population of 6.7 million people. It is famous for its iconic landmarks, such as the Christ the Redeemer statue and the Sugarloaf Mountain.

- Brasília: Brasília is the capital of Brazil, and has a population of 3.1 million people. It is a planned city, and was built in the 1960s.