Plaza Juan José Baz - locals call it La Aguilita - holds one of Mexico City's foundational myths: according to Aztec tradition, the eagle devouring a serpent appeared here, the sign that ordered the founding of Tenochtitlan. A central fountain with that sculpture and benches decorated with Mexican national shields from different eras anchor the space. The honest reality: street vendors occupy much of it, persistent litter is visible, the monument shows wear, and after 5pm security thins noticeably. Arrive in the morning, and the experience shifts entirely. It survives as a half-hidden jewel rather than a managed site - worth a stop if you understand what you're seeing, disappointing if you don't.
The ambulantaje has taken over most of the space, so manage expectations before you arrive. The central fountain and the medallions tracing every version of the national shield tell the founding myth of Tenochtitlan better than most museums do, and that is worth seeing early, before midday, when the crowd is thinner
When to go
Visit in morning hours. After 5pm, conditions deteriorate noticeably.
How long
Budget 30 minutes to 1 hour to study the fountain and shield details.
Do not miss
The central fountain sculpture and benches with national shields - the symbolic core.
Entry
Free accessopen 24 hours. Cleanliness and safety vary by time of day.