>>212304555 (OP)
Paraná spent 225 years as part of São Paulo, being the last state to be dismembered, only gaining independence in 1853 as a punishment to São Paulo for its involvement in the liberal revolts of 1842.
>>212305398
Pretty sure a few other states were dismembered after 1842.
Amazonas was created around 1850, I think. Before that it used to be Grão-Pará.
Tocantins was created in 1988.
I think Mato Grosso do Sul is also new.
>>212307440
Boa Vista, capital of Roraima, was also planned. It was built in the 40's, I think.
There's probably nothing interesting to do in these cities, to be honest.
>>212307938
No idea. Maybe. Roraima is one of the poorest states, I believe.
These cities were planned to help develop those previously sparsely inhabited areas of the country, much like Brasília itself.