The 3-day essentials plus a full day trip, usually Teotihuacán.
Five days adds a day trip, usually Teotihuacán, on top of the 3-day essentials.
(Placeholder draft.)
Weekly emails — what's happening in CDMX, plus a deep-dive guide like this one.
One weekly note on what's happening in CDMX, plus a deep-dive from the guide — no need to come back and check.