It is the location of one of the world's chakras (spiritual energy centers).

Do I believe the Earth has chakras? No. But, if I am wrong, and the Earth actually has energy centers, Teo would certainly be one of them.

Regardless of whether one believes in geo-chakras, it is especially ironic that a shooting occurred there.

It's quite a amazing looking place from the photos I've seen.

I have climbed the steps to the top of the Pyramid of the Sun. An amazing view from there. You can see so much. But it was an arduous and somewhat treacherous climb. Steps are very uneven. I can see where people could fall and even die on those steps. So sad that someone chose such a beautiful and peaceful place to do kill and do violence.

It's a very chill place for a tourist site in Mexico. It's such a massive place that it rarely seems crowded (except atop the Pyramid of the Sun, which can get busy especially if you've got a fear of heights like I do). It's really a very stunning place with new parts of the site uncovered nearly every year and spectacular murals in the museum that look as if they were painted yesterday, not 1800 years ago. It was the first major place I visited when I began my doctoral studies on Indigenous Mexican history and to me it was like being in Disney World would be for a kid. I was enchanted.
I'm heartbroken for the tourists who died or were injured; they, like millions of others, just wanted to see and learn. It's a shame some psychotic maniac couldn't have just offed himself instead of having to destroy others.