Comacalco is unique because it is the only pyramid in Mexico that is made out of red brick. I have unfortunately not visited it yet, but I might do it this October.

Templo Mayor is sort of a sour-and-sweet experience in my opinion. While archeologists have done a maervlous job in digging beneath the ruins and have found a few secret passageways with interesting things inside, 80% f this structure was destroyed by the Spanish 500 years ago. The mortar of the ruins were used to build the catholic church adorning the adjacent Zocalo square.

I am personally more in favor of Tlatelolco pyramids and the place doesn’t have tourists! Most of the structures are intact and the plaza de las 3 culturas is really surreal because it’s a mixture between ancient Aztec pyramids, Spanish churches, and retro 1970’s apartments. Very interesting and mostly off the radar for most tourists.