We visited Brazil back when we were working from the road full-time. We stayed beachfront in Copacabana, Rio de Janeiro, working from a hotel during the days and exploring during nights and weekends.
We did a food tour (always one of our favorite ways to explore a city), saw Christ the Redeemer, took a cable car up to Sugarloaf Mountain, and did a walking tour to understand the history and various neighborhoods. We ate our weight in super-fresh acai bowls and loved the coconut vendors everywhere, popping a straw into a coconut for an afternoon snack at the beach.