Like the classic optical illusion of the faces and the vase, look at Rio and you’ll see two sharply contrasting versions. First is the seemingly easygoing beach city of rubber sandals and gushy greetings as insincere as they are well intentioned. (“Passa lá em casa!” “Come by my home!” The carioca will actually be quite stunned if you show up at his home afterward.) On the other side of the illusion is the Rio that loves formality, titles, certificates and hierarchies. A Rio judge has a decade-long lawsuit against the doorman of his building, who refused to call him “doctor” and “sir,” which recently reached Brazil’s Supreme Court, which declined the case.

Editor's note: To give 2015 a proper send-off, we're taking a look back at all our favorite eating experiences of the year.

Let’s say you have only two or three days in Rio. You want to experience a little real Brazilian culture and don’t want to restrict yourself to the obvious tourist stops, overhyped bars and restaurants or usual “gringo” nightlife spots. Our recommendation? Spend a night or day – or both, even – at Feira de São Cristóvão. The feira, which means “fair,” is organized by people from the northeast (nordeste), which is the poorest region in the country. That poverty has led millions of northeasterners to migrate to Rio over the last 50 years to seek a better life. And Feira de São Cristóvão is where they express themselves culturally, musically and, last but not least, gastronomically.