Rio de Janeiro is a great city. It is the secsnd largest city in Brazil, so it is very crowded. The weather is alwaays nice, but sometimes it is very hot.
The best time to visit rui is in the carnaval, because it is a moment of joy and hapiness in all the city.
For tourist, there are nighlife is too exciting, there are a lot of nighclubs and parties to go and have fun.