Mexico City is huge, and a sight to behold

MEXICO CITY is huge. It has a population of about 20 million. It is a surprise, however, to discover how easy it is to wander around its streets.
While it once had a reputation for being a dangerous place — locals like to say “Mexico City is the safest place in Mexico” — it is not as intimidating as other Latin American cities like, say, Caracas, to go walkabout.