Carnival marathon in Brazil

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Carnival in Salvador.

I arrived to Brazil completely not prepared. I bought the flight ticket three days before the flight, but I spent this time sightseeing Spanish cities. I knew that I would be in Brazil just one day before the carnival. My flight landed in Salvador. I have heard about great carnival places: Rio, Recife (and neighboring Olinda) and Salvador. I decided to try to check them out somehow, but I did not had any accommodation organized in any of those places and the carnival time is the most busiest time...