The 'Maria Fumaça', a steam train, still takes tourists to Tiradentes, making it the oldest passenger train still in operation in Brazil. This is the last stretch in operation from the Estrada de Ferro Oeste de Minas (West Minas Railroad), inaugurated in 1881 by Emperor Dom Pedro II. This is the only railroad in the world with 76cm gauge tracks. There is a musem in the station.
Trains run on weekends and holidays, once in the morning and once in the afternoon. I recommed taking the morning one and spending the day in Tiradentes.