Estacao Se do Metro | Praça da Se, Sao Paulo, State of Sao Paulo, Brazil
TurisMetrô  offer a variety of city tours every weekend. The tours are mostly walking but with some use of the metro. There is no charge but you will need to take some money with you to buy metro tickets during the tour as necessary. Tours start at the TurisMetrô desk in Sé metro station at 9am and 2pm on Saturdays and Sundays; you need to arrive half an hour earlier to sign up. The desk is inside the ticket barriers, so if you arrive by metro don't leave the station while looking for the desk or you'll have to pay for an extra ticket to get back in, and if you're already in the area you will have to pay for a ticket to gain access to the desk, although you will use it to make the first journey of the tour so it's not wasted. The guides speak English.