There are too many restaurants that few people don't even know. (1 mistake, maybe 2)
a few people; many/plenty of/a lot of
Here in the free time have always places to go. (2 mistakes, maybe 3)
in your free time; there are always / you always have; also, punctuation/word worder
It's the: a) catedral; b) cathedral; c) kathedrall (with correct pronunciation)
B
Brasilia sure has the wonderful project of meaning for simple things. (please explain)
????
Although, one really insteresting thing is that one of the greatest architects has made the project of the whole city.
However
What I love the most about the city are the national heritage and the logical of the constructions. (2 mistakes)
what I love is; the logic
Has too many events in the city (1 mistake, maybe 2)
There are; a lot of / plenty of
There's always a where you can know about the city is history. (3 mistakes)
a place where; learn/get to know; city's history