Newly discovered Aztec Carvings tell of Epic Cosmic Battle

[a la izquierda]

3. All of the colonial district of Mexico City...

is like a weird dual earth. You know when you're standing on the street that, in certain spots, 500 years ago there were canals and vibrant city streets under your feet. It's a very odd sensation.
I imagine there are other places on earth like that, but Mexico City's the only place I've been to. Also weird is that the whole colonial district is uneven because of the fact that Tenochtitlan was built on a lake, and Mexico City atop it. The city is essentially sinking, even though it's been drained.
The best juxtaposition is standing in front of the Catedral Metropolitana to the left and the ruins of the Templo Mayor to the right. Absolutely eerie.