What this section covers. Packages built around the museums of a city that has around 170 of them — second in the world only to London by most counts.
Where a guide actually helps. The National Museum of Anthropology, which is too large to absorb unaided: twenty-two galleries, and the upper floor on living indigenous cultures that most visitors never reach. The muralism circuit — the Palacio Nacional, Bellas Artes, San Ildefonso — where the paintings are arguments about Mexican history and almost unreadable without context. And the Templo Mayor, where what you are looking at is a sequence of superimposed buildings rather than one.
Where it does not. The Frida Kahlo Museum, which is small and self-explanatory — but which sells out daily online, so a package that guarantees entry has real value even if the guide does not.
What to confirm. Whether entrance fees are included; the guide's language; whether the guide is certified by the tourism ministry, which for archaeology makes a substantial difference; and the group size.
Practical notes. Almost every museum closes on Mondays and is free on Sundays for residents, which makes Sunday the most crowded day of the week. Prices and validity change — confirm with the operator.