Turisbus
Website:
http://www.mexicocity.gob.mx/index.php?idioma=en
Operated by the Mexico city administration. Bus tours covering more than 130 major sites of interest including museums, national monuments, parks and galleries along the Old Town and Reforma corridors. Tickets available on buses, which come and go at around 30 minute intervals and can be mounted and dismounted anywhere in the tour. Although most of the tours are in Spanish, a translator service is available on most buses.