Ok i have to chime in. Great that you are coming to mexico. I am sure you'll have a great time.
Mexico is without a doubt a poor country. But compaing to Cambodia is far fetched. I live in Mexico, lived in puebla as well.
Ok, enough with that. I think that the ny times is a good resource. You should try to get to the pyramids near Mexico city.
In Puebla you should also try to spend some time in cholula. Great place, many contrast, pyramid, religion, etc.
Now, my favorite almost secret place close to cholula is tonananzintla. It has one of the most unique and beautiful interiors, a prime example of Mexican barroque.
Originally Posted by Colin Corneau