Brasília

Brasília is a peculiar (peculiar means strange) city in all aspects. The city, planned and built from scratch to be the Capital of Brazil, is full of architectural and urbanistic attractions, the most famous one being most of them , Oscar Niemeyer and Lucio Costa's project. (this means Niemeyer and Costa worked on this project together)

The main attractions are the Government buildings and the architectural landmarks with its differentiated designs, curves and lines. Nevertheless, Brasilia also offers options related to nature and parks. The most famous symbols of Brasília are the "Catedral Metropolitana", the "Congresso Nacional" and the "Ponte JK".

The attractions that we recommend are the Nacional Museum, that shows the best of Brazilian art with exhibitions of renowned artists with important themes for the society, and the Planetarium that has workshops, films exhibitions, a digital library, etc.

Very nice job Larissa. The last part of the first paragraph is not right. If you mean "most architectural and urban attractions in Brasilia are by Oscar Niemeyer and Lucio Costa" then you should say "... attractions, most of them being Oscar Niemeyer and Lucio Costa's projects." If you mean 'the most famous or the best attractions are by Oscar Niemeyer and Lucio Costa', then say "...attractions, the best ones being Oscar and Lucio's projects." For famous buildings, often we use 'the.' 

If Tommy and Sally have the same mother, you can say "tommy and sally's mother." If Tommy and Sally have different mothers, you can say "tommy and sally's mothers."

Brasília

Brasília is a peculiar city in all aspects. The city planned and built from scratch to be capital of Brazil is full of architectural and urbanistic attractions, being most of them , including projects by Oscar Niemeyer and Lucio Costa.'s project.

The main attractions are the government buildings and the architectural landmarks with its their differentiated designs, curves and lines.  Nevertheless, In addition, Brasilia also offers options related to nature-related activities and parks. The most famous symbols of Brasília are the "Catedral Metropolitana", the "Congresso Nacional" and the "Ponte JK".

The attractions that we recommend most highly are the Nacional Museum, that  which shows the best of Brazilian art with exhibitions of renowned artists and important societal  themes for the society and the Planetarium, which that has workshops, films exhibitions, a digital library, and more.,etc.

Hope this helps!  It is probably best not to use "etc" much in writing.  You make Brasilia sound very interesting!