This is the 1038th most frequent Portuguese word.
áfrica
Africa – A continent located south of Europe and west of Asia.
Here, 'África' is used as a proper noun representing the continent, serving as the object of the verb 'visitar'.
Eu sonho em visitar a África um dia.
I dream of visiting Africa someday.
'África' is again a proper noun referencing the continent, acting as the subject of the sentence.
A África possui uma rica diversidade cultural.
Africa has a rich cultural diversity.
In this sentence, 'África' refers to the continent in a possessive form showing its historical context.