The capital city of Brazil is Brasilia, a master planned city built in the late 1950s where nothing existed before in the Mato Grasso plateaus. Now, more than 1.9 million people reside in the Federal District.
The city itself is very new built in the shape of an airplane, when asked where you're from the locals refer to their neighborhood as - the such and such wing or tail, etc. The city is very modern and it's chock full of interesting architectural features.
By using your international cell phone rentals in Brazil you can easily navigate Brazilia.