Heading to Rio for the 2016 Summer Olympics? Don’t miss Brazil’s biggest (and best) city.

An eight-year veteran of Brazil’s hospitality industry, Samuel Campos calls the electric city of São Paulo the most vibrant in the country. As a concierge at the modern, ark-shaped Hotel Unique, he knows all the spots for his guests passing through the busy (and unexpectedly beautiful) business hub.

For more on São Paulo, read “Here’s How to Have One Spectacular Day in São Paulo.”

Visit fortune.com/blackbook for more travel guides and insider tips.

A version of this article appears in the April 1, 2016 issue of Fortune.