Also, if you end up in other areas around town, then check out the day and night stalls not far from the Monument of Revolution, the daytime stalls on the southside strip "Eje 10 Sur" where huge Tianguis set up in Coyoacan, or the "Hospital Zone" on the main strip in Tlalpan. There's another huge one north of town not far from the North Bus Station. But for anyone riding a bike on Sundays while the streets are shutdown, there'a large flea market on north Reforma on the right hand side, not far from the historic site of Plaza de las Tres Culturas where the student massacre occurred.