The Santo Domingo - Santa Catarina Walking Route is the third in the "Heart of Mexico" series of self-guided tours through Mexico City's Center.
This one takes strollers on a trip into the deep past. You'll reach some of Mexico City's most evident colonial history, and some that's even older. And all from just northwest of the Zócalo.
The points along the walking tour can all be visited in the space of an afternoon. See the footnote at the bottom of each entry for the official Walking Tour Text.