It's a tie between Juruena (in Mato Grosso) and Serra (in Espirito Santo).
The biggest city in Brazil is São Paulo. It has by far the best infrastructure. Rio de Janeiro is the most beautiful city, though. It is more expensive to stay in and is fairly violent, due to the amount of foreigners visiting. The Northeast also has wonderful beaches.
SouthEast of Brazil in São PAulo City
Ciudad Juárez
Chicago, Illinois
crime city
Round Rock, Texas.
Detroit
São Paulo
Political
Brasilia is the capital of Brazil. The coordinates for this city are 15.7989 degrees S, 47.8667 degrees W. Brasilia is the fourth most populated city in Brazil.
Rio de Janeiro
Sao Paulo, Brazil is the most populous city in South America with a population of about 11,200,000 in the city alone. It's metropolitan area has a population of around 20,000,000.