Mexico City - little time available: what to see?

[RC1807]

I have a business trip to Mexico City end Nov/early Dec. I'll arrive on a Tue afternoon, and have meetings at least all day Wed & Thu, and fly home Fri night - so I've maybe Tue pm and Fri to see some stuff.

What would the PH collective consider as the "you *MUST* see this/go here" whilst I'm there, please?

Thanks orflee!

Russell

[RC1807]

Surely will!
Is Mexico City considered more dangerous than Bogotá or Buenos Aires? I went to both last Autumn.
We were looking at hotels near our meeting locations, but the locals advised against it, so now staying at the Grand Hyatt, which means 45-60 each way by taxi.

What's to see? I now only have a Tue afternoon/evening free!

[RC1807]

Thanks for the comments. Appreciate the options given.