Beco de Batman is the nickname for an area in the Vila Madelena neighborhood in Sao Paulo. This area located between Rua Gonçalo Afonso and Rua Medeiros de Albuquerque is famous because it contains open-air murals made by artists.
These (few) photographs were taken in April 2019, during a business trip and it is a safe bet that the paintings have changed since.
Unfortunately, I didn't take the time to write down the names of the artists.